Conversations are not legal contracts; if you knowingly and selectively choose your words to give the wrong impression (and abusers are skilled at doing) you are lying.
I don't agree. Deceiving and lying are two different things. You are describing somebody being deceptive.
You can deceive somebody and still be 100 % truthful.
Conversations can be legal contracts. A verbal contract is a contract. It might be hard to prove that the contract exists, but that doesn't mean that there was no agreement.