[hosepipe]

[B].. No one who is not alive can observe Reality. Thus one presumes life and consciousness are more basic and more general.
[T]... Doesn't that lead to a conclusion that nothing exists unless and until it's been observed?
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Depends on how one defines reality...

It's possible "your reality" is only a facet of Reality..
i.e. Second Reality..

Meaning.. all humans have versions of second reality.. -OR-
humans discussing reality is like;

Chimps inspecting a Rolex Watch... intrigued but inadequate to grasp "the Thing"... except that it's "shiney"..

[tacticalogic]

Depends on how one defines reality...

If everyone has their own definition, then you're never really sure what the other person is talking about. That would arguably have some entertainment potential but it doesn't seem particularly useful.