Existence is not a predicate? What does this mean?

Question

It is obvious that existence is not a predicate, for my existence is not the subject that grammarians give their attention. Then "existence is not a predicate" is synonymous to "existence is not a property". Existence is not a property?

Although most undergraduate students whose major is philosophy know "existence is not a property" as a slogan, they don't know why. What if existence is a property?

Answer 1

That is a statement by Emannuel Kant. It basically means existence is not a posession. According to Kant, existence is not a predicate, a property that a thing can either possess or lack. I think you should read this: http://en.wikipedia.org/wiki/Existence.

Answer 2

Hi. Existence may not be a predicate but a predicate is definitely an existence.