Looks like a fun way to kill an hour or two lol
I like the “tree falls in the forest” one, thats a classic question, and actually, if there is no one there to “observe” the tree fall, then no, it doesn’t make a noise because the tree (and the entire forest) don’t exist yet. What we perceive as a tree and a forest are at any given moment only 3dimensional illusions of something much more complicated that exists in a 10 (or 11) dimensional universe, and it only becomes a “tree and forest” when we observe it. So, there is something there, just something far more complex then we can even imagine, and our observations of it enable it to “become” the tree and forest that we take for granted as being “real”.
However, this means we need an entirely new definition of the word “real”.