actually, no.
When Peterson talks about the Dawinian test for truth, he means whether an action or discovery will help the survival of the human specie. In his few, the knowledge about how an atom bomb works is not "true" because it threatens our existence.
OK, so the task is to give that result coherence. As far as I can tell, the collision comes from using "true" in the realist sense of the word - root facts about the world - and in a more pragmatic way: the result of what we claim those facts to be. He's coming at it from the other direction. You don't first find truth and then use it to build up other things, you first find those other things and then label their causes true or false.
I know it's weird, but Peterson kept repeating this inverted structure. Harris just didn't accept it, even provisionally.
In realism, we think that, even if we do not always have direct access and experience of the world around us, we can build up a coherent picture of that world independent of our own beliefs and desires. Furthermore, facts retain their truth value when decomposed, so reductionism is available to us as a tool. Further-furthermore, all this is separate from ethical and moral judgements - the facts of the world do not care and do not come pre-bound to a value system.
In contrast, Peterson seems to hold that, while we may have some connection to facts as they are, these are meaningless atomistic things that do not sum in a coherent fashion. That would be similar to: "Wet" doesn't come from any fact about Hydrogen and Oxygen. Anthing deserving the label "truth" has certain consequences because it is embedded in a fabric of reality, and we do not have meaningful access to other than the consequences. Further, these consequences, and truth itself, have an intrinsic ethical dimension - in Peterson's view, a defining ethical dimension.
I have a white pages here. It purportedly has the phone numbers for members of my community in it. Is it true? Well, the realist suggests we test it by calling a few people and matching the numbers with the names and addresses of those who answer. Peterson says that's a fool's game. The real truth of it rests in whether or not it provides a certain utility - perhaps the ability to connect us as a community and this isn't captured in individual numbers (which may get reassigned) but in how well the phone book supports "the good." First we must decide the ethical use of it and only then evaluate the truth of it.
I think if Harris were to ask him, "Is
this true?" He'd get a lot of "I don't know's." And I think if Harris were to ask him for an example of a "true thing," he'd get back, not a concrete, specific, material object in the world, but a conceptual schema instead.
I'll check out the Joe Rogan thing and see if I agree with my own analysis, since I'm pretty sure I put words in Peterson's mouth above.
ETA: I forgot to mention - "truth" isn't that important to Peterson's worldview, and it's a bit unfair to beat him up for it.