In my opinion, I compare this question to black-or-white analogy. There's black and white, which may represent right or wrong, truth or lie, but there's also gray in between. Depending on the situation, the amount of black, white, and gray may vary. Sometimes we figure out what we thought was wrong was actually right, and vice versa. Other times there's so much gray area that it's very difficult, sometimes impossible, to know what the truth is. Sometimes truth varies from culture to culture and religion to religion.