Yup, cuz it's from the set theory where all is a s...

# language-proposals

[masted]

Yup, cuz it's from the set theory where all is a set, e.g. 1 is the set of single element. So-called singleton sets or 1-tuples, for such sets you always can write 1-fold product as 1×1. So #C09222272 here. 😆