Despite what publishers would like to tell you, there really is no such thing as Artificial Intelligence in video games. Any video game AI is, ultimately, nothing more than a complex flowchart. Because of this, it's very tricky to make computer opponents behave the way a human player would. While it's possible to design an AI that receives data similar to what a player receives, then analyzes it to make a decision, this is immensely difficult. Since the AI is an integral part of the game engine, a far easier (and thus much more common) technique is to simply pluck the information directly from the engine, and base all AI decisions on that.