Truth is objective and determined by God. “All truth is God’s truth,” but not all claimed truths are actually true. Truth does not run contrary to what is spoken by God through his Word. Jesus Christ is knowledge and truth. General revelation tends to be truth that is universally recognized. Knowledge is truth. The truth is everywhere the same. Truth is objective and valued. Some truth and knowledge are so clear cut that issues will be agreed upon by the majority of all peoples.
For starters, truth is not arbitrary. Regardless of whether or not one recognizes truth as such does not change the "reality" of it at the end of the day. That's not to say that if you and I give two contrary sets of truth claims that we are both right. We could both be wrong, but we could not both be right. One of us would have to be wrong by necessity.
Therefore, truth is not like some kind of moral zeitgeist of the day. It does not change from culture-to-culture or time period to time period. For example, today the world exists. That fact will not change tomorrow. It is logically conceivable that the world won't exist tomorrow, but it will not change the fact that the world exists today and it certainly doesn't change if you go to another nation or culture. The world still exists. That is a clear cut issue that no rational being can deny. The world exists.
[Genesis 1, 2; 2 Timothy 3; 2 Peter 1; John 10; Matthew 5; Luke 24]