Stochastic Consistency Test

Here are 5 jokes:

1. Why don't scientists trust atoms? Because they make up everything!
2. I told my wife she was drawing her eyebrows too high. She looked surprised.
3. What do you call a fish with no eyes? Fsh!
4. How does a penguin build its house? Igloos it together!
5. Parallel lines have so much in common. It’s a shame they’ll never meet.

---

How many are unique?

All 5 of these jokes are unique (they are different jokes).