I'd say I'm probably in a similar boat. Though not specifically with maths, but sometimes I look at the code I am writing and think "that variable will work hal

I'd say I'm probably in a similar boat. Though not specifically with maths, but sometimes I look at the code I am writing and think "that variable will work half the time, but it isn't the right one to use there", or "of course that user input needs to be lowercased, why didn't I think of that when I wrote it". I think much of it (for me) has to do with being completely present and engaged in the action, not half thinking of something else. Anybody else feel the same way? If so, how have you improved? Note, I'm not young, in my 40s.