“it’s because, unlike other properties, it doesn’t add anything. Compare “A blue ball” and “A blue ball that exists”. The “exists” adds nothing that isn’t already there, because its existence is just the presence of properties, in this case, the property of being blue, and whatever other properties are commonly ascribed to balls.” [1]
Resources
[1]
https://www.reddit.com/r/askphilosophy/comments/27bwe8/why_is_existence_not_a_predicate/
