paulolc
I much more prefer and find it useful, the concept of proto-truth you’ve so eloquently presented, than the relative truth one. Using the term “relative” alongside with “truth”, necessarily implies the mistaken notion that truth is relative, which I perceive as different from what you are describing, which sounds to be more like some kind of perspective, framing or point of view. Relative truth, begs the association with individual or cultural relativism, the (damaging?) idea that something can be true for one person or culture but not for another.
Truth is generally understood to be a factual and accurate representation of reality. That is, a belief or statement is true if it matches up to the way the world is. If two people disagree about something, it can’t be that both their beliefs about it match up to the way the world is. It cannot be the case that what each believes is “true for them.”
Maybe we can call The Truth, the set of all true statements.
With regards to absolute truth, it’s certainly possible to ascertain absolute truths in statements involving definitions. “All living things will eventually die.”, 2+2=4, A cannot be not-A, etc.