Don't get me wrong, it's important you know the real truth, but that isn't often the one you gain much from promoting.
Promoting actual truth can be rather damming at times.
You mean belief, which causes major problems when conflated with truth.
Belief is useful for planning, but needs a separate static truth to have predictive value.
Anyway, there's no other definition of "truth" that isn't a mockery of the word as used. In practice you work with the closest you can get at the moment, but you don't redefine your terms down to match.
I don’t plan to exit my apartment through the window because I know there’s no relative truth of what will happen.