Interesting how the mind likes to fill in the blanks of perceptions with repeated experience of like perceptions. Gaining more knowledge and experience of something could  lead to future blindness to possibly more interesting and yet to be discovered attributes, simply because we perceive ourselves to have already perceived all there is to know about the whatever. Learning to view the overly familiar freshly each time from different perspectives is a great exercise in all areas of perceptions and schools of thought. That's why I like discussing things on groups like this one, so my Ego's perceptions of things can be checked and challenged. Unfortunately I don't think there is near enough of this going on in public schools or American colledges. It seems we are told what to believe and then are graded upon how well we believe what we are taught.

Don't limit that to American colleges...as one with first-hand experience, I have to say that the UK is much worse for "spoon-feeding" rote-learning style education throughout the education lifestyle (primary thought post-graduate) than the US is, in general.