I find this follow on article really helpful: https://shinesolutions.com/2018/01/08/falsehoods-programmers...

It contains concrete examples of each of the ideas listed in the first article.

The author there reads the point "Two different data entry operators, given a person’s name, will by necessity enter bitwise equivalent strings on any single system, if the system is well-designed" by thinking in terms of erroneous spelling, but also relevant is encoding issues such as lookalike characters.

Peter Biľak gives a story on bumping into this for the accent in his name. https://www.typotheque.com/articles/lcaron