Farkel said:
Let me ask you a question, then: can "everything" exist if the only set is "nothing?"
I see two possibilities. There can be "it exists" or "it does not exist" We are in the "subset" as you call it, "it exists" which can understand "nothing" as a concept. We are not in the "subset" "it does not exist." If "nothing" exists, than the concept "everything" would not exist. The concept "nothing" would not exist either.