Should you reject somebody for the simple reason that they already rejected you months ago?

Should you reject somebody for the simple reason that they already rejected you months ago?

If they reject you but change their mind do they get a shot or do you reject them for it?

Updates
+1 y
I will give you an example.

Guy: Hey would you like to go out sometime? Her: No thank you you're really not my type.
Updates
+1 y
Comes back months later and says: hey sorry I said that I was having a bad day. Do you still want to go out?
Should you reject somebody for the simple reason that they already rejected you months ago?
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