Back in the good ole days of Modernism, we dealt in absolutes. Scientific inquiry, evidence, and reasoning were the standards by which we determined what was true. And when we said “true,” we meant objectively, verifiably, demonstrably, absolutely TRUE, without question.
As cultures are wont to do, that pendulum swung hard the other direction and gave us Postmodernism. A grain of truth - that no one is unbiased, and subjective experience always colors our understanding - grew to a harvest that now rejects absolutes and denies objective truth. In Postmodernism, truth is discerned by individual perception and “lived experience.”
Truth is not a primary goal of Postmodernism. Maybe not even a goal at all. To the Postmodernist, knowledge is plural. There’s no singular answer, only lived experiences that mean none of us has access to one singular Truth. In fact, to them, no singular Truth exists.
Of course, the academics came along and codified it into Critical Theory, which questions if objectivity is possible or even desirable. According to Critical Theory, knowledge is socially constructed and entirely dependent on context and demographics. Their goal is not to resolve questions or conflicts with evidence-based truth; it is to disrupt and undermine established ways of thinking (like logic and reasoning).
Enter Marxism. Marx viewed the world through one lens: oppression/oppressor in the economic realm. The original Critical Theorists were Marxists. They assert that the first step of change and revolution is criticism of the system itself. Make noise - create problems - emphasize the plight of the oppressed - and they expanded this lens to not only economics, but also race, gender, class, ethnicity, sexual preference, etc.
So here we are:
Objective, verifiable Truth is (at best) unknowable and probably doesn’t exist at all
Knowledge hinges upon individual perception and lived experience (rather than evidence and reasoning)
Truth is irrelevant; what matters is oppression and power
The only way to resolve this is via conflict, dismantling systems of power that oppress
The goal of conflict is not Truth (remember, that doesn’t exist), but the destruction of the systems of power that result in oppression
Most unfortunately, this worldview leads us into a hot mess.
No more Law of Non-Contradiction; your truth, my truth, and his truth can be utterly incompatible and simultaneously all be true.
If you make a truth claim based on your personal perception, and I make a conflicting truth claim based on verifiable evidence, whose truth claim is correct? Oh, wait. “Correct” doesn’t matter. We’re both right. But that means we’re both wrong, too.
I am obligated to respect and affirm your truth. It doesn’t matter if it conflicts with mine, because all truths are contextual, and cannot be “wrong.” Therefore, no one can tell anyone else they are right or wrong.