He follows an impressive line up:
The answers is ... it's not really that funny.
It's mildly funny, at best.
What is funny is that Monty Python thought more people would know of these philosophers and their ideas, and then find the matching of wits funny.
The Monty Python Football skit is about as funny as this post (in comparison).
Therein lies the humor of both the skit and this post.
And like I said: mild, at best.