How can Slenderman see or hear ?

Alder, I don't quite see what your main concern is with this thread. How is other people theorizing behind what Slendy *could be* in any way ruining what you enjoy or like about the Mythos?

Human beings are curious, curiosity naturally leads to wanting to know or at least rationalize. Yes, you can't fully explain the Slenderman and nobody ever can because he's 1) supposed to be the unknown and 2) fictional. But I fail to see what's wrong with musing about what could be and could happen. If nobody ever thought about "Hey, what if Slendy did X, Y, and Z, or could do A, B, and C?", then there wouldn't BE any new blogs, vlogs, or ARGs, or any new ideas in the Mythos at all really. At least not that many. Theorizing leads to ideas leads to new stories. And I will never see anything wrong or even vaguely negative about creating new stories as long as they're good.

Slenderman, I've always viewed him as beyond time, and the contradictions are simply because, Slender man is chaos. He cannot be understood, reasoned with, etc.
He can see with ultasonic waves.
He can see without eyes
He can see from every point on his body.
Whatever it feels like