wouldn't know (something) if it hit (one) in the face

Is too oblivious or ignorant to realize or recognize a very obvious thing. You're no expert. You wouldn't know a Rembrandt if it hit you in the face. Tim's not much of a scout. He wouldn't know promising talent if it hit him in the face.

See also: face, hit, if, know

See also:

wouldn't know (something) if (one) fell over one
keep (someone or oneself) in ignorance
keep in ignorance
live under a rock
blind leading the blind
blind leading the blind, the
the blind leading the blind
clueless
be on a different planet
Nice play, Shakespeare!

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