Even if we "validate" data, if so possible, it's still up for interpretation by ourselves, biased. And our interpretation is based on our experience, which is also based on other data, reaching back further and further.
As most of us do not have the capabilities to background-check everything, the most logical response for me is reviewing contradictory interpretation of the same data, apply my personal common sense, and find some accuracy in the middle. And even that is biased.