I'm never impressed by people who state things as facts even though their opinion is based solely on the 'exclusion' process. What I mean is that if you're looking for your keys, it's not going to help you any if you focus on looking in all of the places they're not.
Also, I'm not so egotistical as to state something as fact if I really don't know. For me to believe the earth is hollow, I have to be shown evidence which satisfies my belief parameters. For me to believe it's not hollow, I'd have to be shown evidence which satisfies my belief parameters. Neither has occured as of yet. I'm not going to trust the word of someone who states things based on their own idea of what exists in this universe. I leave that to the confused.

^
That the Earth is solid is proven well enough for me.
However, I still state that it is my opinion that it is a fact.
Afterall, that is just what my belief is, my opinion

who's on first?

Actually, geologists have looked for their "keys" in the right spot and they've found a very unhollow earth.

oh come on we all know that the earth is not hollow maybe cavans in the crust but not the centre the centre is so hot its dried up and burnt liiek chocolate when u melt it (try it ull see) and there are geodes in he mantle size of cities.wow you could be rich.