Must logic exist?

[Rhizomorph13]

So the new question should be, "Is logic an intrinsic quality of reality or is it an artifact of the interaction between the perceived and the perceiver." I believe that logic is an intrinsic quality of reality, much like an inch is a measure of distance intrinsically present regardless of whether it is measured or not. If a tree falls in the woods it causes all things relating to sound even if nobody is there to perceive that sound.