All you seem to need to define truth is that you speak it.
Define truth just for the sentences in that subset.
Fromm can be understood to define truth as a functional approximation of reality.
I therefore define truth as the system of my limitations, and leave absolute truth for those who are better equipped.
I loved Sebes and learned a lot from him about how people the world over defined God, truth, and the good life.
Once again, she defined truth and error on points of doctrine, by means of the messages given to her in vision.
Science is not about "truth" because we quickly run into the difficulty of defining "truth."
In addition a semantics may be given which defines truth and valuations (or interpretations).
The truth did not matter, for these were Marxist ideologues, and they alone defined truth.
A number of problems exist, that arise when defining knowledge or truth, including issues with objectivity, adequacy and limits to justification.