You don't have to talk about memory locations, or computers at all, for the intuition to work. `a_2` is two spaces away from the beginning of the list. The fac

You don't have to talk about memory locations, or computers at all, for the intuition to work. `a_2` is two spaces away from the beginning of the list. The fact that our ordinal numbers are closely connected with the off-by-one cardinal numbers (e.g., "third", meaning the element of a sequence in position 2, is closely etymologically related to the word "three") is an unfortunate defect of language.