I've implemented search engines for small to relatively large organizations. Even at the companies where nobody knew anything about how search hardly any of these falsehoods were believed.

Also this doesn't work as a good Falsehoods Programmers believe thing subject because Falsehoods programmers believe are not about technologies but about non-technological things that are commonly needing to be handled in programs - hence Falsehoods programmers believe about:

Names, Phone Numbers (sort of technical but it's not falsehoods about how phones work, but rather about how phone numbers are structured and what they 'mean'), Credit Cards, Addresses

Good possible future Falsehoods programmers believe about:

Sleep patterns, Personal identifiers, Genders

In fact I am currently dealing with a falsehoods programmers believe about versioning of laws and standards at work.