I was really surprised to find that this post from 2004 about intelligent jokes is the number one search result at Google for ... wait for it ... "intelligent jokes". Not sure how it got there, but that post has about 70 hits a week, far and above anything else on this site.
So, in the vain of that post, here's one that might make 1 in 25 laugh:
Q: Why did the chicken cross the road?
A: To make a normal vector.
