All of the validity of the info we have is verified by heuristics we have, like groupthink, listening to 'experts' and trying to match up the info with our internal knowledge and worldview.
I feel like our current system of information allows us to develop models that are quite distant from base reality, evidenced by the multitudes of realities existing in people's heads, leading some to question if 'truth' is a thing that can be discovered.
I think as people become more and more Internet-addicted, an increasing amount of our worldviews come through that little screen, instead of real-life experiences.