The ability of common sense to misconstrue nature and causality is what led Francis Bacon et al to devise the methods of modern science. I could write a very long list of common sense beliefs that would include phlogiston, spontaneous generation, the Ptolemaic system (geocentric), Lamarckian heritability, flat Earth, mercury as safe medicine, and the superiority of the blue-eyed. I promised I wouldn't respond directly to the troll a few days ago, but wow it's impressive how it got everyone explaining the placebo effect all over again for the umpteenth time.