Originally posted by Mr. Vega
Well, yeah, but what can't be observed can still be infered by showing certain particles will only behave the way they are observed to behave if a certain other particle must exist, even if that particle can't be seen. If it cannot be observed/infered (directly/indirectly), then it makes no sense to say that a certain thing exists.
Well, technology is still advancing, for one thing. There's also an issue in that what we can infer, can be based on a different set of rules to those operating - i.e. the laws of physics, IIRC, differ at a subatomic level - particles can influence others situated miles away (apparently breaking the speed of light to do so). I.e. as we delve deeper, we'll probably discover new rules, new ways to observe and infer, etc.
So what we can infer, at a level deeper than that which can be actively observed / explained, may be incorrect simply because we don't know all the rules. IIRC, there are still many debatable aspects of the rules we do know for these inferences - I think that
how gravity works is still to be fully understood by the current subatomic models.
So to say that we can now see everything we ever will be able to, is almost certainly wrong.