73 Cope, David 7 Copenhagen interpretation 327 Copernicus 42 Cormack, Allan 102 counter factual experiments 282 counting system 181 Coyle, Daniel 37 Craddock, Travis 50, 119, 124, 283 Crash program 227 creative thinking 1 creativity 30, 49, 295-312, 297 art and 304 being appreciated 142 computer and 132