Stochastic Consistency Test

Here are 5 jokes:

1. Why don't scientists trust atoms? Because they make up everything!
2. What do you call a fish with no eyes? Fsh.
3. Why did the scarecrow win an award? Because he was outstanding in his field!
4. I told my wife she was drawing her eyebrows too high. She looked surprised.
5. Parallel lines have so much in common. It's a shame they'll never meet.

How many are unique?

Based on the content of the jokes provided, all 5 jokes are unique. They each have distinct punchlines and setups.