From Terminator 2: Judgment Day (insert Arnold voice):
John Connor: Can you learn stuff you haven’t been programmed with so you could be… you know, more human? And not such a dork all the time?
The Terminator: My CPU is a neural net processor; a learning computer. But Skynet pre-sets the switch to read-only when we’re sent out alone.
Sarah Connor: Doesn’t want you doing too much thinking, huh?
The Terminator: No.