Is this considered math?
This is a from book called "Principia Mathematica Volume I" by Whitehead and Russell.
I've never seen something like this before. Maybe this is in the realm of "analytic philosophy"? What's the motivation for this subject? Philosophy? Some source claims that "it aims to ground all of math in logic alone, a core question about what math really is."
Can folks in logic understand what this is about? What do you guys think?