If you follow the link to his page "I'm upset...Here is why", you can see that this person has a significant degree of "crankiness". These people through their perhaps not deliberate obfuscation, often manage to trick the mathematically naive into thinking there is substance there - "it is so hard and confusing, it must be real math."

It is a disservice to have links like this on Hacker News.

Honestly, Wittgenstein's philosophical critiques of set theory in relation to the foundations of mathematics still hold true today. Shame he doesn't get more recognition for his great work in logic.

i blew a google interview question because i failed to recognize a powerset. keeping up with this stuff is pretty important.

I studied set theory was I young as a student, but seeing something like this reminds me there's so much to learn, and re-learn.