Halfwinged wrote:
" And at the end... if the computers disagree? which one is right? are both wrong? you need a third to control the other 2 with a voting system... is not that simple. "
Two computers running two programs written by TWO DIFFERENT PROGRAMMERS is the way some Railways use for controlling the yards. An order is executed if and only if both computers agree.
A third computer, perhaps a carbon-based one, should make the final decision if they don't.