
In bad faith
Intent Matters
The phrase implies intentional deception, not just a mistake or error.

Claiming to be an expert without knowledge is in bad faith.
Negative Connotation
Using 'in bad faith' suggests a negative judgment about someone's actions.

Ignoring his promises, he acted in bad faith.
Trust Broken
It implies that trust has been violated in a relationship or agreement.

She negotiated the terms in bad faith, not planning to adhere.
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