Inconceivable!

I just went to clean off my white board (dry erase). It has notes from yesterday’s laborious explanation of the under-the-covers functioning of CoCreateInstance, so that my intern would hopefully be able to solve his own problem without my help (it didn’t).

I picked up the same eraser I used to wipe off the same board yesterday. I was erasing ONLY green, same as yesterday.

Somehow, my eraser left tons of black remnants all over my not-perfectly-clean-but-still-serviceable whiteboard. Black. I haven’t used black in weeks.

The only theory that comes to mind is that someone swiped my eraser and replaced it with this other one. Which is, in a word, inconceivable.