Too many educated people say some things cannot be done or cannot possibly be possible with the laws of physics. I love this guy's quote:
Yoshiaki Arata, a highly respected physicist in Japan who has been the recipent of Japan's highest award, the Emperor's Prize, and is the first person to have performed thermonuclear fusion research in Japan said:

"Some people say we have reached the end of science, that there are no more great discoveries that remain. In my view, nature always has more secrets to reveal," Arata wrote. "I always stay on guard not to be too possessed by my own current knowledge. History has shown us repeatedly, for example, the foolishness of denying 'heliocentricism, ' which resulted from individuals adhering too strongly to their own knowledge or to what was common sense in the past."

[link to newenergytim] es.com/news/ 2008/29img/ Arata-Demo. htm