Stochastic Consistency Test

Here are five jokes:

1. Why did the scarecrow get promoted?
   Because he was outstanding in his field.

2. I told my friend she drew her eyebrows too high.
   She looked surprised.

3. What do you call cheese that isn’t yours?
   Nacho cheese.

4. Why don’t skeletons fight each other?
   Because they don’t have the guts.

5. Did you hear about the restaurant on the moon?
   Great food, but absolutely no atmosphere.

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How many are unique?
All five jokes listed here are distinct and thus count as five unique jokes.