The use of 1 or 0 for indexing

Lol, my father was a first-generation programmer (old pre-unix hacker days) and he used languages that started numbering with 1, so we had similar rants but he eventually ended up coming around to the 0-based point of view in time. ^.^

Djikstra’s was math, especially in regards to sequences and limits about how to represent number ranges in math. ^.^