Stochastic Consistency Test

Sure—here are five jokes:

1. I asked the librarian if books about paranoia were available. She whispered, "They're right behind you."
2. Why did the tomato turn red? Because it saw the salad dressing.
3. I bought a boat because it was for sail.
4. Don't trust stairs—they're always up to something.
5. Did you hear about the mathematician who's afraid of negative numbers? He'll stop at nothing to avoid them.

All five are distinct. Number of unique jokes: 5.