10 unchanged sentences
Risk Factors” in this Annual Report on Form 10-K.
−Removed: Co-Diagnostics, Inc., a Utah corporation (the “Company” or
−Removed: “CODX”), develops, manufactures and sells reagents used for diagnostic tests that function via the detection and/or analysis
−Removed: of nucleic acid molecules (DNA or RNA), including robust and innovative molecular tools for detection of infectious diseases, liquid biopsy
−Removed: for cancer screening, and agricultural applications.
−Removed: Our diagnostics systems enable dependable, low-cost, molecular testing for organisms
−Removed: and genetic diseases by automating or simplifying historically complex procedures in both the development and administration of tests.
−Removed: CODX’s technical advance involves a novel, patented approach to PCR test design of primer and probe structure (“CoPrimers™”)
−Removed: that eliminates one of the key vexing issues of PCR amplification:
−Removed: the exponential growth of primer-dimer pairs (false positives and false
−Removed: negatives) which adversely interferes with identification of the target DNA/RNA.
−Removed: Using our proprietary test design system and proprietary
−Removed: reagents, we have designed and obtained regulatory approval to sell PCR diagnostic tests for the detection of COVID-19, influenza, tuberculosis,
+Added: Co-Diagnostics,
+Added: Inc., a Utah corporation (the “Company” or “CODX”), develops, manufactures and sells reagents used for diagnostic
+Added: tests that function via the detection and/or analysis of nucleic acid molecules (DNA or RNA), including robust and innovative molecular
+Added: tools for detection of infectious diseases.
+Added: Our diagnostics systems enable dependable, low-cost, molecular testing for organisms and
+Added: genetic diseases by automating or simplifying historically complex procedures in both the development and administration of tests.
+Added: technical advance involves a novel, proprietary approach to PCR test design of primer and probe structure (“Co-Primers ® ”)
+Added: that dramatically reduces one of the key vexing issues of PCR amplification:
+Added: the exponential growth of primer-dimer amplification (false
+Added: positives) which adversely interferes with identification of the target DNA/RNA.
+Added: Using our proprietary test design system and reagents,
+Added: we have designed and obtained regulatory approval to sell PCR diagnostic tests for the detection of COVID-19, influenza, tuberculosis,
hepatitis B and C, human papillomavirus, malaria, chikungunya, dengue, and the Zika virus.
−Removed: These initial diagnostic tests were cleared
+Added: These initial diagnostic tests are cleared
for use in clinical labs only and not for point-of-care or at-home use.
−Removed: are currently developing a unique, groundbreaking portable diagnostic device and test system designed for point-of-care and at-home
−Removed: The system is comprised of our PCR instrument that we refer to as the Co-Dx™ PCR Pro™ instrument, our proprietary
−Removed: diagnostic test cup system and a mobile application to be installed on the user’s mobile device.
−Removed: We refer to the system as the
−Removed: “Co-Dx™ PCR platform that is being designed to bring affordable, reliable polymerase chain reaction (“PCR”)
−Removed: testing to patients in point-of-care and at-home settings.
+Added: are currently developing a unique, groundbreaking portable diagnostic device and test system designed for point-of-care and at-home use.
+Added: The system is comprised of our PCR instrument that we refer to as the Co-Dx™ PCR Pro™ instrument, our patent-pending diagnostic
+Added: test cup system and a mobile application to be installed on the user’s mobile device.
+Added: We refer to the system as the “Co-Dx™
+Added: PCR platform which has been designed to bring affordable, reliable polymerase chain reaction (“PCR”) testing to patients
+Added: in point-of-care and at-home settings.
The Co-Dx PCR platform is subject to U.S.
−Removed: Food and Drug Administration
−Removed: (“FDA”) review and is not available for sale at the time of this filing.
−Removed: In December 2023, we submitted the Co-Dx PCR
−Removed: platform for review by the U.S.
−Removed: Food and Drug Administration (FDA) for Emergency Use Authorization (EUA).
−Removed: The submission included
−Removed: the PCR Pro instrument, Co-Dx PCR COVID-19 detection test cups, and mobile app, all designed for use in point-of-care and at-home
−Removed: There is no guarantee that our Co-Dx PCR platform will receive the necessary regulatory approvals for commercialization,
−Removed: or that, if regulatory approval is received, we will be able to successfully commercialize this platform.
−Removed: believe our proprietary molecular diagnostics technology is paving the way for innovation in disease detection and life sciences research
−Removed: through our enhanced detection of genetic material.
−Removed: For various reasons, including owning our own platform, we believe we will be able
−Removed: to accomplish this faster and more economically than some competitors, allowing for significant margins while still positioning ourselves
−Removed: as a low-cost provider of molecular diagnostics and screening services.
−Removed: For example, we were the first US-based company to receive a
−Removed: CE-marking for a COVID-19 test in early 2020, as we worked to help slow the spread of the pandemic through our global network of distributors
−Removed: covering clinical labs in more than 50 countries.
−Removed: Our Logix Smart COVID-19 test was designed, developed, submitted for regulatory approval
−Removed: and ready to be used as an in vitro diagnostic or IVD in countries that accept a CE Mark as approval for use of the test in a period
−Removed: of just over 30 days.
−Removed: This is a real-world example of how the CODX technology can be used in an evolving epidemic or pandemic to get
−Removed: diagnostic tools in the hands of medical professionals in a timely manner.
−Removed: It can be similarly used to design a test for mutated strains
−Removed: of the virus should they not be detectable using currently available tests.
−Removed: addition, continued development has demonstrated the unique properties of our CoPrimer technology that we believe makes it ideally suited
+Added: Food and Drug Administration (“FDA”) review
+Added: and is not available for sale at the time of this filing.
+Added: In June 2024, we completed our first U.S.
+Added: Food and Drug Administration (FDA)
+Added: application for 510(k) clearance for the Co-Dx™ PCR Pro™ instrument, the Co-Dx PCR COVID-19 Test, and the Co-Dx PCR mobile
+Added: app for over-the-counter (OTC) use.
+Added: Following productive engagement with the FDA related to the regulatory submission, the Company withdrew
+Added: its 510(k) application.
+Added: The decision to withdraw the submission was based on discussions with the FDA regarding the ability to detect
+Added: a potential deterioration of one component of the test, related to shelf-life stability.
+Added: Following dialogue with the FDA and exploring
+Added: the various courses of action available, we determined that the best long-term solution would be to submit a version of the test that
+Added: has been enhanced to address the matter raised in the 510(k) review process.
+Added: The Company plans to submit the next iteration of the Co-Dx
+Added: PCR COVID-19 test for 510(k) OTC clearance, following the collection of clinical evaluation data to support the new test’s performance.
+Added: A new submission also allows the Company to incorporate more recent Co-Dx PCR platform developments into the COVID-19 test, which the Company
+Added: believes will also help create greater operational and manufacturing efficiencies, such as consolidating manufacturing processes to utilize
+Added: the next generation of test kits and instruments across all tests on the at-home and point-of-care Co-Dx PCR platform.
+Added: There is no guarantee
+Added: that our Co-Dx PCR platform will receive the necessary regulatory approvals for commercialization, or that, if regulatory approval is
+Added: received, we will be able to successfully commercialize this platform.
+Added: believe our proprietary and patented molecular diagnostics technology is paving the way for innovation in disease detection and life
+Added: sciences research through our enhanced detection of genetic material.
+Added: For various reasons, including owning our own platform, we believe
+Added: we will be able to accomplish this faster and more economically than some competitors, allowing for significant margins while still positioning
+Added: ourselves as a low-cost provider of molecular diagnostics and screening services.
+Added: For example, we were the first US-based company to
+Added: receive a CE-marking for a COVID-19 test in early 2020, as we worked to help slow the spread of the pandemic through our global network
+Added: of distributors covering clinical labs in more than 50 countries.
+Added: Our Logix Smart ® COVID-19 test was designed, developed, submitted
+Added: for regulatory approval and ready to be used as an in vitro diagnostic or IVD in countries that accept CE marking for regulatory clearance
+Added: in a period of just over 30 days.
+Added: This is a real-world example of how CODX technology can be used in an evolving epidemic or pandemic
+Added: to get diagnostic tools in the hands of medical professionals in a timely manner.
+Added: It can be similarly used to design a test for mutated
+Added: strains of SARS-CoV-2 or other viruses should they not be detectable using currently available tests.
+Added: addition, continued development has demonstrated the unique properties of our Co-Primers technology that we believe makes it ideally suited
for a variety of applications where specificity is key to optimal results, including multiplexing several targets, enhanced Single Nucleotide
2 unchanged sentences
rapidly screen millions of possible options to pinpoint the optimum design.
−Removed: The intellectual property we use in our business, consisting
−Removed: of the predictive mathematical algorithms and patented molecular structure used in the testing process, which together represents a major
+Added: The intellectual property we use in our business consists
+Added: of the predictive mathematical algorithms and patented molecular structure used in the testing process, which together represent a major
advance in PCR testing systems.
4 unchanged sentences
enabling us to maintain profit margins.
−Removed: proprietary test design process involves identifying the optimal locations on the target genes for amplification and pair the locations
+Added: proprietary test design process involves identifying the optimal locations on the target genes for amplification and pairing the locations
with the optimized primer and probe structure to achieve outputs that meet the design input requirements identified from market research.
5 unchanged sentences
production tests to confirm that the product as designed meets the user needs.
−Removed: our proprietary test design system and proprietary reagents, we have designed and obtained regulatory approval in the European Community
−Removed: and in India to sell PCR diagnostic tests for the detection of COVID-19, influenza, tuberculosis, hepatitis B and C, human papillomavirus,
−Removed: malaria, chikungunya, dengue, and the Zika virus.
−Removed: In the United States, we obtained Emergency Use Authorization (“EUA”) for
−Removed: our Logix Smart ® COVID-19 detection test from the Food and Drug Administration, or
−Removed: FDA, and we sell that test to qualified labs.
−Removed: In addition, our COVID-19 detection test and certain of our other suite of COVID-19 products
−Removed: have been approved for sale in countries such as the United Kingdom, Australia and Mexico by the regulatory bodies in those countries
−Removed: and have been registered for sale in many more countries.
−Removed: In connection with the sale of our tests we may sell diagnostic equipment from other manufacturers as self-contained
−Removed: lab systems (which we refer to as the “MDx Device”).
−Removed: addition to testing for infectious disease, the technology lends itself to identifying any section of a DNA or RNA strand that describes
−Removed: any type of genetic trait, which creates several significant applications.
+Added: our proprietary test design system and reagents, we have designed and obtained regulatory approval in the European Community and in India
+Added: to sell PCR diagnostic tests for the detection of COVID-19, influenza, tuberculosis, hepatitis B and C, human papillomavirus, malaria,
+Added: chikungunya, dengue, and the Zika virus.
+Added: In the United States, we obtained Emergency Use Authorization (“EUA”) for our Logix
+Added: Smart ® COVID-19 detection test from the FDA, and we sell that test to qualified labs.
+Added: In addition, our COVID-19 detection test and certain of our other suite of COVID-19 products have been cleared for sale in countries
+Added: such as the United Kingdom, Australia, India, and Mexico by the regulatory bodies in those countries and have been registered for sale
+Added: in many more countries.
+Added: In connection with the sale of our tests we may sell diagnostic equipment from other manufacturers, including
+Added: an OEM’s PCR instrument which we refer to here as the “Co-Dx Box”.
+Added: In addition to testing for infectious disease, Co-Primers technology lends
+Added: itself to identifying any section of a DNA or RNA strand that describes any type of genetic trait, which creates several significant applications.
We, in conjunction with our customers, have designed and licensed tests that identify genetic traits in plant and animal genomes.
−Removed: We also have three multiplexed tests developed
−Removed: to test mosquitos for the identification of diseases carried by the mosquitos to enable municipalities to concentrate their efforts in
−Removed: managing mosquito populations on the specific areas known to be breeding the mosquitos that carry deadly viruses.
+Added: have commercialized three multiplexed tests to test mosquitos for the presence of diseases they carry, which enables municipalities to
+Added: concentrate their efforts in managing mosquito populations in specific areas where mosquitos carrying deadly viruses are known to breed.
OF OPERATIONS
3 unchanged sentences
Product revenue
−Removed: $ (33,226,736 )
Grant revenue
Total revenue
−Removed: (27,406,171 )
Cost of revenue
−Removed: (26,110,027 )
Operating expenses
3 unchanged sentences
Depreciation and amortization
−Removed: Goodwill impairment charges
−Removed: (15,388,546 )
Total operating expenses
−Removed: (10,383,630 )
Loss from operations
1 unchanged sentence
(42,706,234 )
−Removed: (15,726,397 )
−Removed: Interest income
+Added: Interest income, net
Realized gain on investments
−Removed: Loss on disposition of assets
+Added: Gain (loss) on disposition of assets
Gain on remeasurement of acquisition contingencies
Gain (loss) on equity method investment in joint venture
−Removed: Total other income
+Added: Total other income, net
Loss before income taxes
1 unchanged sentence
(38,110,556 )
−Removed: (19,263,322 )
−Removed: Income tax benefit
+Added: Income tax provision (benefit)
$ (37,639,008 )
2 unchanged sentences
the year ended December 31, 2024, we generated $3.9 million of revenue compared to revenue of $6.8 million in the year ended December
−Removed: The decrease in revenue of $27.4 million was primarily due to lower sales of our Logix Smart COVID-19 test throughout the world.
−Removed: As global attention and regulatory responses to the COVID-19 pandemic have eased, we have experienced significantly decreased demand
−Removed: for our COVID-19 test.
−Removed: This decrease was partially offset by the generation of $5.8 million of grant revenue during the year ended December
+Added: The decrease in revenue of $2.9 million was primarily due to lower grant revenues, as the majority of revenue for grants previously
+Added: awarded was recognized in the prior year.
of Revenues and Gross Profit
of revenues decreased by $3.2 million from $4.2 million for the year ended December 31, 2023 to $1.0 million for the year ended December
−Removed: Included within cost of revenues for the year ended December 31, 2023 is an increase of approximately $2.8 million related
−Removed: to reserves against certain raw materials and finished goods inventories.
−Removed: The decrease in revenues combined with a larger percentage
−Removed: of fixed product manufacturing costs and reserves for obsolete inventory resulted in a lower gross margin percentage.
−Removed: incurred total operating expenses of $45.3 million for the year ended December 31, 2023 compared to total operating expenses of $55.7
−Removed: million for the year ended December 31, 2022.
−Removed: The decrease in operating expenses was primarily due to the decreases related to the impairment
−Removed: of goodwill, bad debt expense, and third party sales commissions, partially offset by increased expenses related to personnel, including
−Removed: stock-based compensation, increased legal and professional services expenses, and increased investment in research and development.
+Added: Included within cost of revenues is a decrease of approximately $0.1 million for the year ended December 31, 2024, and an increase
+Added: of approximately $2.8 million for the year ended December 31, 2023, related to reserves against certain raw materials and finished goods
+Added: The initial recording of the reserves for obsolete inventory in the prior year, partially offset by the decrease in revenues
+Added: in the current year, resulted in a higher gross margin percentage.
+Added: operating expenses were $43.0 million for the year ended December 31, 2024 compared to total operating expenses of $45.3 million for
+Added: the year ended December 31, 2023.
+Added: The decrease in operating expenses was primarily due to decreased stock-based compensation expense,
+Added: bad debt expense and expense related to development of and clinical trials for the Co-Dx PCR platform.
+Added: These decreases were partially
+Added: offset by increased personnel related and legal expenses.
and marketing expenses for the year ended December 31, 2024 were $4.5 million compared to $6.9 million for the year ended December 31,
−Removed: The decrease of $0.4 million was primarily a result of decreased variable compensation, such as bonuses and commissions, and decreased
−Removed: third-party sales commissions, partially offset by increased professional services and stock-based compensation expense.
−Removed: and administrative expenses were flat at $14.3 million for the years ended December 31, 2023 and 2022, respectively.
−Removed: Increases in professional,
−Removed: legal, and advisory fees, personnel related expenses, and stock-based compensation expense were offset by decreases in bad debt expense
−Removed: and insurance expense.
−Removed: research and development expenses increased by $5.6 million from $17.4 million for the year ended December 31, 2022, to $23.0 million
−Removed: for the year ended December 31, 2023.
−Removed: The primary increase in expenses related to increased personnel expenses, as well as increases
−Removed: in supplies expenses and professional and lab services utilized to further help us in our research and product development activities.
−Removed: the year ended December 31, 2022, the Company recognized charges of $15.4 million related to goodwill impairment.
+Added: The decrease of $2.4 million was primarily a result of decreased stock-based compensation expense, tradeshow and travel expenses,
+Added: consulting and professional services expenses, and personnel related expenses.
+Added: and administrative expenses for the year ended December 31, 2024 were $16.2 million compared to $14.3 million for the year ended December
+Added: The increase of $1.9 million was primarily due to increased legal expenses, partially offset by decreases in stock-based compensation
+Added: expense, bad debt expense, consulting and professional services expense, and insurance expense.
+Added: and development expenses for the year ended December 31, 2024 were $21.0 million compared to $23.0 million for the year ended December
+Added: The decrease of $2.0 million was primarily a result of decreased expenses related to development of and clinical trials for
+Added: the Co-Dx PCR platform and stock-based compensation expense, partially offset by increases in personnel expense and professional services
income was $2.5 million for the year ended December 31, 2024, compared to other income of $4.6 million for the year ended December 31,
The decrease in other income of $2.1 million was primarily due to a change in the fair value of contingent consideration liabilities,
−Removed: driven by changes in the Company’s stock price, and partially offset by increased interest income and realized investment gains
−Removed: due to the Company’s investing activities.
+Added: an increased loss related to the Company’s joint venture investment, and decreased realized gains from investments in marketable
realized a net loss for the year ended December 31, 2024 of $37.6 million compared to $35.3 million for the year ended December 31, 2023.
−Removed: The decrease of $21.1 million was primarily the result of reduced sales of our Logix Smart COVID-19 test, increased operating expenses
−Removed: as discussed above, and a decrease in the gain related to the fair value of acquisition related contingent consideration liabilities,
−Removed: partially offset by a decrease in impairment charges related to the impairment of goodwill recorded in the prior year and increased interest
−Removed: income and realized investment gains.
−Removed: Additionally, we recorded an income tax benefit of $2.8 million during the year ended December
−Removed: 31, 2023, compared to an income tax benefit of $4.6 million for the year ended December 31, 2022.
+Added: The larger net loss of $2.3 million was primarily the result of decreases in grant revenue, changes in the fair value of acquisition
+Added: contingencies, and decreases in realized gains from investments in marketable securities, partially offset by a decrease in operating
+Added: Additionally, we recorded income tax expense of $0.1 million during the year ended December 31, 2024, compared to an income
+Added: tax benefit of $2.8 million for the year ended December 31, 2023.
+Added: The primary reason for the change in the provision for income taxes
+Added: is a result of the Company now recording a full valuation allowance.
AND CAPITAL RESOURCES
4 unchanged sentences
liabilities of $7.3 million.
−Removed: cash used in operating activities during the year ended December 31, 2023 was $22.1 million, compared to cash provided by operating activities
+Added: cash used in operating activities during the year ended December 31, 2024 was $29.2 million, compared to net cash used in operating activities
of $22.1 million for the year ended December 31, 2023.
−Removed: The decrease in cash from operating activities was primarily due to decreases in
−Removed: revenue and increases in operating expenses.
−Removed: cash provided by investing activities was $15.4 million for the year ended December 31, 2023, compared to net cash used in investing
+Added: The increase in cash used in operating activities was primarily due to decreases
+Added: in revenue, grant funding, and realized gains on investments, and increases in cash-payable operating expenses.
+Added: cash provided by investing activities was $17.1 million for the year ended December 31, 2024, compared to net cash provided by investing
activities of $15.4 million during the year ended December 31, 2023.
1 unchanged sentence
due to interest and realized gains related to marketable investment securities, as well as the redemption of certain investments as they
−Removed: cash used in financing activities was $1.4 million for the year ended December 31, 2023, compared to $14.0 million of cash used in financing
−Removed: activities for the year ended December 31, 2022.
−Removed: The decrease in cash used in financing activities is primarily due to fewer repurchases
−Removed: of outstanding common shares during 2023 as compared to 2022.
+Added: cash provided by financing activities was $0.1 million for the year ended December 31, 2024, compared to $1.4 million of cash used in
+Added: financing activities for the year ended December 31, 2023.
+Added: The cash provided by financing activities during 2024 relates to issuances
+Added: of common stock, compared to cash used in financing activities for repurchases of outstanding common shares during 2023.
commencing sales of our Logix Smart COVID-19 test in March 2020, we have used our cash generated from those sales to fund the purchase
of inventories and the development of our Co-Dx PCR Platform, and to pay our operating expenses.
−Removed: We have increased our work force most
−Removed: significantly in research and development in order to continue development of the Co-Dx PCR platform and additional tests that will enable
−Removed: continued use of our distributor network to sell additional products throughout the world.
−Removed: believe that our existing capital resources and the cash generated from future sales will be sufficient to meet our projected operating
−Removed: requirements for the next 12 months.
−Removed: However, our available capital resources may be consumed more
−Removed: rapidly than currently expected and we may need or want to raise additional financing for strategic opportunities.
−Removed: It is anticipated
−Removed: that the Company will continue to generate operating losses and use cash in operations in the near term.
−Removed: needed, we expect additional investment capital to come from additional issuances of our common stock or other equity based securities
−Removed: with existing and new investors similar to those that have provided funding in the past.
−Removed: On March 16, 2023, the Company entered into
−Removed: an Equity Distribution Agreement with Piper Sandler & Co.
−Removed: (“Piper”), pursuant to which we may sell from time to time,
−Removed: shares of our common stock, having an aggregate offering price of up to $50.0 million through Piper, as agent.
−Removed: No shares have been sold
−Removed: under the distribution agreement as of December 31, 2023.
−Removed: We may not be able to secure such financing in a timely manner or on favorable
−Removed: terms, if at all.
+Added: available capital resources may be consumed more rapidly than currently expected and we may need
+Added: or want to raise additional financing for strategic opportunities.
+Added: It is anticipated that the Company will continue to generate
+Added: operating losses and use cash in operations in the near term.
+Added: If needed, we expect additional investment
+Added: capital to come from additional issuances of our common stock or other equity based securities with existing and new investors similar
+Added: to those that have provided funding in the past.
+Added: We have entered into an Equity Distribution Agreement (the “ATM Agreement”)
+Added: with Piper Sandler & Co.
+Added: (“Piper Sandler”), pursuant to which we may offer and sell shares of our common stock having
+Added: an aggregate offering price of up to $17,111,650 from time to time through Piper Sandler acting as our agent, under our prospectus supplement
+Added: dated October 18, 2024.
+Added: As of December 31, 2024, we have sold 314,707 shares of common stock under the ATM Agreement resulting in net
+Added: proceeds to the Company of $0.2 million.
+Added: we are seeking to obtain additional equity and/or debt financing, such funding is not assured and may not be available to us on favorable
+Added: or acceptable terms and may involve significant restrictive covenants.
+Added: Any additional equity financing is also not assured and, if available
+Added: to us, will most likely be dilutive to our current stockholders.
+Added: If we are not able to obtain additional debt or equity financing on
+Added: a timely basis, the impact on us will be material and adverse.
+Added: These uncertainties create substantial doubt about our ability to continue
+Added: as a going concern.
+Added: The consolidated financial statements do not include any adjustments that might result from the outcome of these
+Added: uncertainties.
ACCOUNTING POLICIES AND ESTIMATES
22 unchanged sentences
could reduce our earnings.
−Removed: and Intangible Assets
useful lives of intangible assets with definite lives are based on the expected number of years the asset will generate revenue or otherwise
4 unchanged sentences
Examples of such events or circumstances include:
−Removed: asset’s ability to continue to generate income from operations and positive cash flow in future periods;
+Added: assets’ ability to continue to generate income from operations and positive cash flow in future periods;
volatility or significant decline in our stock price and market capitalization compared to our net book value;
4 unchanged sentences
would increase.
−Removed: For goodwill, the entity has the option to first assess qualitative factors to determine whether it is necessary to perform
−Removed: the quantitative goodwill impairment test.
−Removed: The quantitative impairment test compares the fair value of a reporting unit with the carrying
−Removed: amount, including goodwill.
−Removed: If the fair value of a reporting unit exceeds its carrying amount, goodwill is considered not impaired;
−Removed: goodwill is impaired and the loss is recorded.
−Removed: Upon the completion of our annual evaluation for impairment of goodwill as of December
−Removed: 31, 2022, we recorded a goodwill impairment charge of $15.4 million.
periodically review inventory for both potential obsolescence and potential declines in anticipated selling prices.
21 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.