Can something that exists effect something that doesn't exist?

Update: Dreams exist. They are electronic symbols
Update 2: My bad. Signals
Update 3: Gravity exists. It effects space. Does space exist?
Update 4: Laws exist in writing.
Update 5: affect/ effect. ... Most of the time, you'll want affect as a verb meaning to influence something and effect for the something that was influenced. The difference between affect and effect is so slippery that people have started using "impact" as a verb instead.
Update 6: Can something be an affect and effect at the same time?
Update 7: The purpose of language is to be understood, not to appease spelling nazis
Update 8: If there are trillions and trillions of universes be created every second, Santa clause may exist
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