Is there any identifiable attribute to truth other than EXPERIENCE of it appearing to be true ?

Is there any more ' truth ' to it ? 

Things we've believed to be true for millennia have been provided with evidence to be false. Even mathematical truths. Many years later, somebody finds a flaw in a proof which everyone thought was perfectly done. And we haven't gotten any smarter. We're still just as capable of mistaking something to be true as a species. It's just that we as a species have compiled a far greater collective pool of knowledge than at any time in the past. It's still a few billion minds, at most, with differential abilities and willingness to arrive at what the certifying authorities of the time accept to be true. There are limitations. 

But more importantly, even if there weren't any limitations to such abilities too, how do we know something to be true ? How do we ascertain if something we believe to be true is in fact, true ? Is there any definition of truth which doesn't rely on the definition of reality ? For it begs the question - What is reality then ? That covers synthetic truths
Is there any proof for all accepted proofs being valid ? That covers analytic truths.
We believe something to be true for the singular reason that we experience it to be true.

Truth is just an experience. Which means every concept we have of reality is just an experience.

Is there anything which exists which isn't present experience ? For even when past experiences are recollected or future experiences anticipated, the recollection or anticipation is an experience in the present moment.

Is there anything outside present experience to ever seek ?