Sometimes the other party is not open and easy going, but judgemental and suspicious. This makes the other person aware their free choice is limited, even if they are sure they have done nothing wrong. They can either choose to tell a lie and hope life continues undisturbed by nastiness, or they can be truthful and risk a row or some other unpleasantness, even violence.
It's no contest.
I am talking of course, about an abusive relationship, so this is an extreme scenario that maybe not all will be aware of
I have never been able to figure out the answer to this question. I wish I knew.
Sometimes the truth hurts
in reply to Rosewater
Not always, I have seen the truth used as a weapon just to hurt. It is the reason for the lie, not always the lie itself that can cause pain. Telling a child that their picture is the most beautiful one you have seen, may be a lie, but it is not hurtful, telling someone that you think they look fat, or that they are stupid, or that you dislike them, might be true, but at the same time, does it really need to be said?
It is the motivation, not the lie, or truth that counts
Many reasons--maybe they feel ashamed of the truth. I knew a compulsive liar and he was trying to cover up his low self esteem.
Maybe they are afraid and cannot stand up to the consequences of their telling the truth.
what is really sad is when they believe it to be the truth.