never ask the barber if you need a haircut

英語（米国） (en-US) 英語（イギリス） (en-GB)

ことわざ

Do not seek advice from a biased party.

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As a rule of thumb in negotiations, never ask the barber if you need a haircut; instead, seek counsel from an impartial advisor.

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意味（1）

Do not seek advice from a biased party.

You never ask the barber if you need a haircut. What do you think he will say? So corn farmers tell Congress that ethanol is good and will help stop the greenhouse effect and make cars run smoother and we will all be in energy heaven if we listen to them.

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