Solomonoff induction justifies this : optimal induction uses a prior which weights hypotheses by their simplicity.
Let me clarify my question. Why do you and iarwain1 think there are absolutely no other methods that can be used to arrive at the truth, even if they are sub-optimal ones?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.