prueba del algodón

Spanish

Etymology

Literally, “cotton test”. The phrase comes from a detergent TV ad from the 1980s[1] in which a butler passes a piece of cotton across a surface to prove that it is perfectly clean. At the end of the advert, the butler triumphantly proclaims "the cotton doesn't deceive".

Noun

prueba del algodón f (plural pruebas del algodón)

1. (Spain) acid test

Related terms

• el algodón no engaña