John 1:1 What is logic?

It is useful to define terms. Here I define logic as "a thing is not what it is not".

This definition, when applied to itself, gives rise to the whole universe. It even arises from the absence of logic, so it exists with no assumptions whatever. I summarise how this works on my answers site.

I also have another page on logicism.  Each page is only about 200 words. If we cannot say something briefly then we do not understand it sufficiently, for understanding requires communication.

Just to clarify.