@kennethamy,
kennethamy;157605 wrote:What does it mean to say that something "does not exist at all"? Do you believe that existence is a matter of degree?
No, I do not. By "does not exist at all" I meant "is not even an abstract object".
kennethamy;157605 wrote:Of course the two ideas are not identical. They are quite different. But how would that imply that Holmes and Claus are not identical or that they are identical?
I was not claiming that Holmes and Claus are identical or not identical. I was arguing as follows:
1. Let us suppose that Sherlock Holmes and Santa Claus do not exist, period. Not as fictional characters, imaginary beings, or anything.
2. Therefore, the idea of Sherlock Holmes is not an idea of anything. It is just an empty idea. It has no content. It is not an idea
of anything, because "an idea of X" refers to X, and thus implies that there is an X. And in this case we are supposing that there is no X.
3. The same applies to the idea of Santa Claus.
4. Now, since the idea of Sherlock Holmes and that of Santa Claus are both empty ideas, they (the ideas themselves) are identical as regards their content, for they both have zero content. Zero is identical to zero. (Note here that I am talking about the properties of the
ideas themselves. I am not claiming that there are any properties of the
contents; obviously there could not be, if there are no contents.)
5. If two ideas are identical as regards their content (because they have none), then they are indistinguishable.
6. But the idea of Sherlock Holmes is in fact distinguishable from that of Santa Claus.
7. Therefore (1) must be false.
Logical?