The concept of marginal utility strictly requires a cardinal utility function
the verdict
REFUTED
the evidence says no
confidence 0/100
Economic theory and modern research demonstrate that the concept of marginal utility does not strictly require a cardinal utility function, as it can be formulated using ordinal utility approaches.
Evidence against · 4
Wikipedia: Marginal utility
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Reference article covering this claim directly
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More against · 3
en.wikipedia.org: Cardinal utility
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Economists proved that under mild conditions ordinal utilities imply cardinal utilities, showing it is not strictly required as a baseline limitation.
doi.org: Mathematical Proof of the Ordinal Marginal Preference Theory Under the Fixed Exchange Conditions
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It mentions the development of an ordinal marginal utility approach, refuting that marginal utility strictly requires cardinal utility.
doi.org: The Austrian Theory of the Marginal Use And of Ordinal Marginal Utility
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States explicitly that the concept of marginal utility is not dependent on cardinal utility and is consistent with ordinal utility.