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It is the simple hypotheses of which one must be most wary; because these are the ones that have the most chances of passing unnoticed.

— Henri Poincaré

C'est même des hypothèses simples qu'il faut le plus se défier, parce que ce sont celles qui ont le plus de chances de passer inaperçues.

Original text (French)

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Notes from Wikiquote

Thermodynamique: Leçons professées pendant le premier semestre 1888–1889 (1892), Preface

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Attribution

Quote text and notes from Wikiquote: Henri Poincaré (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.