Is This What They Really Want Is Not a Proof of These Two Propositions

If a physical object exists, it's a thing to be met within space. And how do we say it exists? We just observe it, demonstrate it to a little bit of ostention. So continuing on 169 is this what they really want is not merely a proof of these two propositions,. But something like a general statement as to how any propositions of this sort may be proved. This, of course, I haven't given and I do not believe it can be given.