Paradoxical Profile Puzzles: Logic Loops

A logic loop is a puzzle where the solution is hidden in plain sight, but the path to it is a maze of contradictions.

Here's a puzzle for you to try: Solve it.

Which way is up?
When is now?

Subpage: This isn't here.

Avoid the trap of the Donkey in the Room.

Or try to escape the Twisty Puzzle Tunnel.