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<p>...is simply the mathematical property of uniqueness up to a linear transformation. Von Neumann-Morgenstern utility functions and time-discounted utility functions are two examples of this cardinality. When the von Neumann-Morgenstern axiomatization of expected utility was published, there was some discussion about whether the authors had resurrected measurability from its prior disrepute. A consensus was then reached that cardinality and measurability (in the above sense) were different concepts, and the former in no way implied the latter.</p>
<p>—[[Shira Lewin]], ''Economics and psychology: lessons for our own day from the early twentieth century<ref name="teaching.ust.hk"/>''</p>
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