Hell, I know a lot of
humans who wouldn't understand why that's funny. And some of them have 4-year college degrees.
Many responses in this thread are along the lines of "computers will never be as smart as Carl Sagan", ignoring that most intelligence on this planet could never dream of being half as smart as the genius we're using to define AI. Let's start by getting a computer as smart as a border collie, one of the more intelligent dogs.
Saying a computer isn't smart because it can't laugh at a highly complex visual joke is entirely the wrong way to define AI, and it's no surprise we haven't achieved it. It took humans millions of years to get this smart, and we've only been working on AI for a very, very small amount of time.