[Zarel]

All I'm really getting is "everything has a lot more exceptions than you think".

I don't think any of them about programmer hubris specifically. A lot of people could fail to realize that "23:59:60" is a valid time, for instance.

[alexvoda]

Indeed. It's not that they apply only programmers. It's that programmers are the ones who have to deal with this mess.

[jakobloekke]

I actually think these lists should be called "Falsehoods designers/PO's/etc. believe about x". As a programmer, you may have to neglect these complexities sometimes, even though you know about them and have made the case.

[WorldMaker]

I think some of it too is herd logic. Oh the number of times I've gotten a PM or QA to say "You should validate this field in this particular way..." and the only response to "Why?" is "Because everyone does it that way."