Totally agree, in a mathematical proof you wouldn't ignore the edge case just because you think it might work the same way it has for some of your other proofs.

Totally agree, in a mathematical proof you wouldn't ignore the edge case just because you think it might work the same way it has for some of your other proofs. It would invalidate everytihng, and in sequential processing, you could really mess up some of the data with one iteration with a 1/0 assumption that completely changes every iteration after it. Bad news.