Shimon 81, 82 permutation of information 135 Persia 15 HOUSE_OVERSIGHT_016104 personal computers 307 PET 107 philosophical proof 246 philosophy 193 Photo Electric Effect 366 photographic memory 119 photons 110, 320, 331, 332, 348 photosynthesis 50, 124 physics 180 determinism 316 Picasso, Pablo 232, 246, 298 pi