It must be hard to understand that we use the word “truth” functionally and completely differently than we actually talk about it. The oddest thing of all is that we deny the function and think our casual use of the term is all there is. It must be hard because most people can’t even see it.
For instance, we say that whatever is true is true regardless of what we believe. We say that truth is elusive. We say that the truth is out there. That’s all causal language.
Functionally, there are only actual states of affairs and our perspectives on what those actual states are. That means that truth isn’t reality but is a word attributed to a perspective we think best describes a state of affairs.
Yes, there is one reality. However, truth is not a property of states of affairs or the sentences we use to describe what we think of them. That means that it is possible to have many ways to describe a state of affairs but no way to say one is true or another is false, as long as their usefulness is the same, essentially. This is the first birthed idea of Pragmatism from Peirce and still echoed by other scientists today; for instance, Mlodinow and Hawking in the pragmatic reprise, Model-dependent Theory.
Reality is “out there”, folks; sentences are “in here”, as Rorty would say.
Nothing is “true”. There are only sentences that entail to justified propositions, or warranted assertability, or reason to assert. And there is no necessary limit to the number of justified ways we can think about any single given state of affairs; making the idea of “a” truth obsolete.
Hence, the functional end of “truth” because when a person thinks something is true, they must argue. In arguing, they are justifying. In justifying, people demonstrate no use for the word “true” but actually, functionally mean that truth is justification. Justification is what we appeal to in order to prove “truth”. We cannot merely appeal to “truth” and have anyone think it’s a justified comment; in other words, a true statement.
That’s what we’ve determined in Western Epistemology in its entire history, which comes from millennia of rigorous thought on human knowledge starting with the Greeks.
Truth is a word and that’s about it. Our use of it is poetic in most cases. However, most mistake their poetry for Epistemology. That’s a mistake.