give somebody enough rope

give a man enough rope and he will hang himself

If you give people the opportunity to do something wrong or detrimental to themselves, they will usually do it; one does not need to interfere to bring about someone's downfall. Don't interrupt him with questions. Just let him keep talking and he'll incriminate himself. Give a man enough rope and he will hang himself.
See also: and, enough, give, hang, he, himself, man, rope, will

give somebody enough ˈrope (and he’ll/she’ll ˈhang himself/herself)

(saying) deliberately give somebody enough freedom for them to make a mistake and get into trouble: The question was vague, giving the candidate enough rope to hang herself.
See also: enough, give, rope, somebody
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