I agree to an extent.  The opening presentation at a quantum physics convention, the presenting scholar said (paraphrasing) 'When we say we know what we are doing, we are wrong - you have to throw all your precepts out to begin to understand new concepts.' I can say by my experience that I (we = lab group) were blindsided by results with 'new' discoveries, and THAT was the exciting part about research - probing the unknown. Coming to a conclusion isn't always cut and dried - it is an interpretation often because most experiments only take a step or two - hah - such as a "brick in the wall."  Science is flawed by human nature and their biases.  Even a mature scientist can come to a 'clouded' conclusion because of his/her bias.