“When I was a graduate student, I proved the temporal order of events was relative; i.e., whether event A precedes event B or B precedes A in time depends on the frame of reference of the observer.”
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I taught a class in intro relativity and quantum mechanics for two semesters. When it came to that stuff I needed to stick strictly to the book or I would confuse myself due to that problem so much that it was really a danger that I would completely mess up my students. Frame of reference stuff seems like it should be so elementary until you start really getting into it, then it can become impossibly obtuse.
Yep, that's why I never told anyone else about it. I figured I had probably just made a mistake somewhere, though my friend couldn't find it, if so. And for the life of me, neither could I. Still, there was no way I was going to waltz off to one of my professors and suggest I had found something new! It's too easy to make a mistake and not realize it. Then you look like an idiot. Strange in a way because that's what math and physics are all about: making a million mistakes. That's how we learn. But you better not make that one or you're through.