"Truth" is a Greco-Roman construct. Islam, like Christianity and Judaism, is heavily influence by Greek philosophy which, it turn, was heavily influenced by Egyptian and Babylonian thought (not to mention heavy doses of Indian philosophy). In the Modern West most serious thinkers accept that "Truth" is highly dependent of context. This is what is meant by "post-modern". People, as a rule, like to base their truths on facts but facts themselves are held to definitions. For instance, it is a fact that there are more people working in the USA in 2026 than in any time before. That fact can be held as evidence of a booming economy unless one takes into account that there are also more people in the USA than ever before. Truth becomes squishy.
You could just say, look there are still millions of Palestinians alive in Gaza so clearly there has not been a genocide because if is one then they would all be dead. That's a truth
You could say that genocide is a legal term that means the attempt to wipe out a people by killing and scattering them and repressing their language, religion culture, etc. It is action and intention. That is a truth and many often point to the genocide of the North American Indians by the US as an example of such
Epistemology is founded on the principle of Justified True Belief. If we do not have knowledge, we have nothing. If we cannot "know" things, then morality goes out the window, and now it is possible in some world to torture a baby for fun. That is what you get with "post-modern relativism."
Exodus 34:6
"The LORD passed in front of him and proclaimed:
The LORD—the LORD is a compassionate and gracious God, slow to anger and abounding in faithful love and truth,"
The word for "truth" here is actually truth. It comes from the Hebrew word אֱמֶת
Truth is not a nebulous term. It is a person. Why? If you start to ask "Why?" questions, then you inevitably end up with a "Who?" question because Truth is gounded in minds. And minds come from a person. So, which person, in all of human history, is the Truth? That would be Jesus Christ who said,
John 8:31-32
"“If you continue in my word, you really are my disciples. You will know the truth, and the truth will set you free.”"
All the world religions want a piece of Jesus. They all say He is part of the way, or you can get to the way through Him. But he does not share his glory. Rather, He says,
John 14:6
"“I am the way, the truth, and the life. No one comes to the Father except through me.”"
Everyone says Jesus is "a" way, but Jesus says he is THE way.
Jesus is the Truth.