Quote Originally Posted by Transigent
Quote Originally Posted by Cone
As for your question, it is essential because it shows that a proposition is nonsensical unless it is defined.
Shouldn't a correctly stated proposition have all definition implcit within it?
Well, it's the idea that a proposition is a picture of reality. If a proposition has no corresponding object or event, then it's invalid.

And this is important because it disproves the notion of "existence", "existence" being the entity left when you remove all properties of an object.
Assuming that "object" isn't just shorthand for properties.
Yes. A strange, supernatural entity is appearing in the definition of "existence", for some reason.