Good point. As you can see, this thread is occupied by a number of people who use the word "truth" loosely.
Whatever they regard as truth for them, they want to believe it is THE truth for all.
After all, if you see it from their perspective, if they really believe what they hold as truth is THE truth, then by definition, anyone who disagrees with them must be preaching falsehood, a twister of the Word of God, and so on and so forth.