Early in the picture, when they are testing Colossus to see if they are still in control after it had issued an order for communication with Guardian -- They are waiting for a 30 minute time period to pass -- the computer should not at that time repeat the order as it had been acknowledged and ordered not to do so. Before the time was up, originally the following conversation took place: Blake: Colossus can not exceed its programming. It's impossible. The computer cannot physically change its guts. Forbin: Anything the human mind can conceive of is possible, Blake. Blake: Really, Charles? OK, how about a four-sided triangle? Forbin: A triangle in three dimensions would be four-sided. Cleo: It's called a pyramid. In all copies of this film since it was first released on video, the conversation does not take place. The scene just cuts to 30 minutes later with Blake saying "We're still boss".
