Can i say - 1

[Alabady]

Every ability is called potential, unless it is used.
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Or it does not make a sentence ?

 

[Abstract Idea]

Every ability is called potential, unless it is used.
​

Or it does not make a sentence ?

Yes, you can say that. It makes sense.
However, depending on what exactly you want to say, and mainly depending on the context, I would say it differently.