مکالمه انگلیسی با موضوع نقد کسی که شما با او مخالف هستید

Criticism of someone with whom you disagree

Criticism of someone with whom you disagree
You’re clueless. (informal)
You’re without a clue. (informal) (or you don’t have a clue)
You wouldn’t know the truth if it jumped up and bit you on the nose. (jocular)
She doesn’t know nothing. (informal)
 You don’t know beans. (informal)
You don’t know up from down.(informal)
 You don’t know which end is up. (informal)
You don’t know quality from a hole in the ground. (informal)
quality = art, value, truth, engines, etc.
Don’t you know anything?
How can you be so stupid? {informal)
Get your head out of the sand. (idiomatic)
That ain’t the way I heard it. (folksy)
    That’s not what  I heard.
    Let me set you straight.
Also:
You don’t know your ass from your elbow. (vulgar)
 You don’t know your ass from a hole in the ground. (vulgar)