I think it is partly linked to IQ. I agree that there are probably limits to the levels people at low IQs can achieve,
But there is also a development process that takes time. Few teenagers, no matter how smart, are at level 5 Think by analogy that few 15 year old people have mastered quantum field theory. No matter how smart you are it takes time
Sokal is emulating level 3 people who think they are level 5. These people are anti-modern not post-modern. Most post-modernists are at level 3 as far as I can tell. I have been trawling through their works to assess this.
A level 5 physicist might be someone like say Robert Laughlin a Nobel Physicist who wrote a book "A Different Universe" questioning how fundamental 'fundamental' physics is. He has mastered modernist physics and is now building on this. This is very different from a Deepak Chopra type who doesn't even get to first base in this enterprise.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.