<prompt> Translate the following text to EnglishKwa sababu ya hesabu za msingi na ufahamu mwingi, Arrow alilazimika kufanya kuchunguza ikiwa mfumo wa kupiga kura wa busara ni moja ambayo inaheshimu umoja na inazuia flip-flops, basi hakuna mifumo ya kupiga kura ya busara, na ubaguzi mmoja - mfumo ambao huchagua mpiga kura mmoja na kumfanya kuwa dikteta.  <response>: With a bit of elementary mathematics and a lot of keen insight, Arrow was forced to a sobering If a reasonable voting system is one that respects unanimity and precludes flip-flops, then there are no reasonable voting systems, with one exception--the system that picks one voter and makes him a dictator. 