Likewise. I don't always do this, but for problems that cost me much time or effort, I like to try to make sure that, if I wanted to reproduce a bug or problem,

Likewise. I don't always do this, but for problems that cost me much time or effort, I like to try to make sure that, if I wanted to reproduce a bug or problem, I'd know exactly how to write it. Writing and understanding working correct software is, it turns out, a rather different skill from that of writing and understanding broken (or confusing) software. I'd also wager good money that the latter skill directly builds the former.