Yep. And only truth's (partial) knowability allows us to distinguish between illogic and logic, nonsense dogma and verifiable claims, etc. I have a historian friend who was fond of saying "History is only what white males claim to flatter their white maleness." "But you're an historian. You write history. Doesn't that contradict your claim? And how can you even know that they're misrepresenting historical fact unless historical fact could be known apart from what people misrepresent about it?" "Well, umm, uh...." Thirty-nine years in academia, in the middle of its split between fact-seeking scientists and truth-fogging humanities "scholars," has left me with no patience for one side of this divide. When one of my daughters almost died from a rupturing appendix, I was damn glad that her doctors, nurses, and technicians--and all the scientists who'd spent centuries ferreting out all that knowledge--weren't relativist clowns.