What do you consider a lie?
Is consciously leaving out information or details lying? If you only get part of the info, is it really the truth?
If someone repeatedly, or maybe habitually, omits info can you trust them? When do you draw the line?
This is a tricky topic because we all do it to some degree. Sometimes it is not on purpose, but other times it is an outright choice.
I guess the question really comes down to: Are you prepared to stand your ground when you know you are being deceived on purpose or do you just let it slide?