We were moving the bedframe earlier today and I say that I think that it's not square. In order to fix it, I grab the tape measure and start to measure the diagonals. (If they're the same, then the bed frame is square.) I measure one diagonal and ask Teri to hold it the other way and she refuses. I'm kind of astounded, but before I can say anything she tells me to use the level. Uh, what? I tell her that levels don't work that way. She gets in a huff and I say "fine, here's the level" and had it to her. She huffs and says "no, the other level", so I hand her the laser level. She puts it flat on the ground and it won't shine a light and she gets frustrated. It won't shine a light because it just uses a weight to balance it to level and without the weight pointed down, it doesn't work. So I switch it over to straightedge mode and hand it back. She lines up the line with the two feet away from the wall and says something. I forget now what, exactly, but I point out that while that is a straight line, I turn it a little, and that's also a straight line. At some point during this I point out that levels only generate straight lines in parallel with the ground, not in parallel to some other arbitrary points. I didn't get around to pointing out that we know that the two lines are parallel and that we need to fix the angles, because by this point, she gets upset and says that we're done for the day.
I know that I should be past the fact that she's completely irrational, and I think I am, but it still confounds me that she refuses to allow me to be rational, and gets upset by it. I don't know whether to laugh or cry.