If a tree falls in the forest and no one is there, does it make a sound?Nope ... it makes (probably) movements of air molecules. Whether there is a sound, and, more importantly, what sound it is, is entirely a function of whether there is a brain there to detect/interpret those movements, and, more importantly, of which particular brain it is. (see Biology 202, 29 March 2001 for similar argument about color) OR ... to put it differently:
Albert Einstein and Leopold Infeld, The Evolution of Physics, 1938 |
THIS IS NOT YELLOW |
THIS IS NOT YELLOW |