We admit that cloning is the bailiwick of biology but when talking about basic mechanisms all sciences eventually turn into physics. According to the movie, the customer's lifetime of information passes from a computer into the clone's brain in a matter of seconds. It normally takes a human lifetime just to pass the visual information from the eyes into the brain and this is normally done at a very high rate. Transferring all sensory input as well as conscious and unconscious thought data into the brain in 4 or 5 seconds would require a rate over a billion times faster than the rate eyes acquire just visual data.--from a review of some schwarzenegger tripe 'the 6th day,' from this stupid movie physics page (there are others--if i weren't so lazy, i'd find an .edu to link to.)

i started thinking about this, though. senses and memory, data equivalents, transfer speeds... wow.

To cover itself, the movie throws in a quick mention that the human energy source powering the machines is combined with a source of fusion. This is like getting on a 747 and having the captain explain in great detail that the plane is rubber band powered, then add that it also has four jet engines. Guess which power source gets it off the ground, duh.--from the 'matrix' review  ¶ 10:22 PM