Stochastic Consistency Test

Okay, 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 tomato turn red? Because it saw the salad dressing!
4. What has a neck but no head? A bottle.
5. What do you call a lazy kangaroo? Pouch potato!

Now, to answer your question about uniqueness:

Each of these jokes has a different setup and a different punchline from the others in the list. They are distinct jokes.

Therefore, there are 5 unique jokes within this list of 5.