I find that insistent cogitation on unanswerable questions makes one susceptible to superstition and nonsense. As others before me have said, it’s okay to leave something alone if a reasonable explanation doesn’t present itself, but you’ll have to train yourself to do it, because the human mind doesn’t like mysteries and blank spaces: We feel compelled to put something in place just so we don’t go crazy. Or to put it another way, there’s great wisdom in learning how to distinguish between “unexplained” as a label for mysterious phenomena and “not yet explained” as a better label when, frequently, it’s more appropriate.
In another thread, I described a semantic trick I use to short-circuit the obsession. When I’m confronted with what I consider a meaningless question, either because it’s formulated improperly (a nontestable proposition) or because there isn’t enough evidence to make a solid judgment, I respond with a nonsense question of my own or a nonsense answer that allows me to dismiss the inquiry rather than focus on it. It’s a colorless green idea, sleeping furiously, and I don’t need to think about it beyond that.
I actually had cause to use it a few days ago. I was talking to a credophile about their belief that a recorded snippet of sound was evidence for a ghost (don’t ask). They asked me if I heard the weird noise in the recording; I said yes. They asked if I thought it was a ghost; I said no. They asked how I explained it, then, if I didn’t think it was a ghost; I said, “It’s the opposite of Elvis.”
In short, just because a question can be formulated doesn’t mean it can or should be answered. My stock nonsense question at the moment is, as you might guess, “What is the opposite of Elvis?” One’s immediate reaction is that it’s a silly question, but it’s a well-formed thought in terms of grammar and superficial logic, so it sticks in your head, and you can’t help starting to think about things that would satisfy the inquiry, at least in your own mind. Everyone does this, and even if you resist it you’ll mentally consider options ranging from The Beatles to a platypus in a cowboy hat. Just because the question can be subjectively answered, though, doesn’t mean it’s worth asking.
So that’s how I get away from subjects like that, unknowable and unanswerable questions and topics that throughout human history have permitted the introduction of supernatural arglebargle into our worldviews. I drop it into the Opposite of Elvis bucket, and I forget about it.