Truth vs. result
It seems to me as if there are roughly two kinds of people. Truth-people and result-people. Some are both but for the most part, I think you are either more of the one or of the other.
The basic question is: To what degree are you willing (or able) to negate the truth in order to obtain a better result? The question alternatively put: to what degree are you willing (or able) to be quiet about what you know, since you know that your quietness will make things easier?