homo mensura

ho·​mo men·​su·​ra | \¦hō(ˌ)mōˌmenˈsu̇rə\

Definition of homo mensura 

: a doctrine first propounded by Protagoras holding that humankind is the measure of all things, that everything is relative to human apprehension and evaluation, and that there is no objective truth

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History and Etymology for homo mensura

Latin, literally, man the measure

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