Number

Say a thing exists.
One thing.

The one thing and everything that is not that thing
are two.

The one thing and the not-the-one-thing are a set
which if considered as a thing makes three.

The number that would be four is a mystery.
What is the "not-the-set" that is {one thing and everything other than one thing}?

A not-the-set
or a set that is {not-not and not-is the one thing}?

"Four" is apparently the beginning of letting go even as symbol is generated. Four is extraordinarily conceptual: slipperiness ineluctable.