Physicists do say these things about quantum mechanics — a highly-mathematical description of fundamental reality at the bottom of which is the uncertainty principle in which the act of measuring one piece of reality screws up other measurements. The upshot is, the whole of reality isn’t measureable all at once. The more you think about it, the worse it gets. At some point, physicists say, the whole discussion starts to sound less like physics than philosophy.
Once I heard a physicist say some quantum thing was “highly theoretical” and since he had an accent, I wasn’t sure I heard him right.
“You didn’t say, ‘highly theological?’ did you?” I said.
“Yes,” he said.
Once I went to a talk by a philosopher of physics and I’m never doing that again.
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Q: Is 
This summer it’s happened three times so far. Once, I got an urgent email from the backyard pool where they have baby swim lessons. Another time, my older son’s swim teacher pulled the class out of the high school pool and taught the kids “safety skills” on the deck. And when we were at camp, on the hottest day of the week, we peered through the chain link fence at a pool that was blue, inviting, and—because of recent events–empty.
