Who defines logic (20-rule)?
You asked “who defines logic” then you say “there are no truths but there are lies, I guess your answer would be that “you” define logic cause you just did. However, no (wo)man actually defines logic, logic defines itself, kind of like time “it just IS”. Man takes note of what he sees about logic and writes the (already defined) logic down on paper. Man doesnt define or create any of the fundamentals that cause this great universe to move. Although we do a damn good job at observing how it functions and using its (already) made laws to our advantage. The answer is the creative force that “created all this stuff” defines logic.