I won't believe it until we send someone down there The Core-style to poke it with a stick and record a video of the proceedings on their cell phone.

When your latest understanding is based on new evidence consistent with and supportive of your previous understanding, then it is a confirmation. It really isn't necessary to blindly hedge on what we know unless you're willing to call into question the concept of knowledge itself.

Confirmation and truth are not the same here. Confirmation is evidence paralleling expectation.