That makes sense. I ran across the idea, informally, back in the 1990s in grad school. And what I heard then was concerning. I heard physicists saying that it w

That makes sense. I ran across the idea, informally, back in the 1990s in grad school. And what I heard then was concerning. I heard physicists saying that it was fine. But I also saw that their notion of fine and mine did not agree... I had not really updated my understanding much since then.