Empty Set doesn't exist

If you cant sense it, then it doesnt exist.

You cant see emptiness, therefore emptiness doesnt exist.

>>9

If your definition for existence is being able to see it with your eyes, then nothing can exist for a blind person. Sound does not exist. Odors do not exist. Infrared light does not exist. Heat does not exist.

It doesn't matter what your definition for existence is. It doesn't change the fact that the empty set is a useful idea.