Arrow's impossibility theorem

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Notion

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Science and technology

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What Wikipedia says

Arrow's impossibility theorem is a key result in social choice theory, proved by American economist Kenneth Arrow. It shows that no group decision-making procedure based on ordinal utilities (citizens' orderings of different alternatives) can satisfy the requirements of rational choice.

Excerpt from the Wikipedia article “Arrow's impossibility theorem”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Linda A. Cicero / Stanford News Service, CC BY 3.0, via Wikimedia Commons.