Arrow's Impossibility Theorem ● Five conditions: Completeness Unanimity Transitivity Independence of irrelevant alternatives No dictators o Conclusion no voting system can satisfy all these conditions. (Arrow's impossibility the eoremArrow’s Impossibility Theorem • Five conditions: – Completeness – Unanimity – Transitivity – Independence of irrelevant alternatives – No dictators • Conclusion: no voting system can satisfy all these conditions. (Arrow’s impossibility theorem)