"...  consciously or unconsciously we [all] carry bias ..." Yes, of course.  If my vehicle is making a funny engine noise, when I describe it to my mechanic, she will have a certain bias about what the problem might be.  However, her bias in that case would likely be quite a lot better informed than that of some random Joe on the street.  

A year or so ago, had pretty much this same Yucca Mountain discussion with another one of our esteemed compadres on these boards.  That individual was absolutely, positively adamant that the conclusions of the Yucca Mountain researchers *had* to be rejected out of hand, because they were so obviously "partisan"!  (That is, their conclusions were Politically Incorrect, and therefore the quality of the underlying science and engineering was totally irrelevant ...)  

Sheesh.  Indeed, some days you just weep for the future of the Republic.  :(