AI advantages

Situation: I have level 3 militia in a mountain. Stealthed right?

The enemy player AI has no interceptors and no AC above lvl 2. Still should not be seen right?

I log off and come back 2 hours later to find a stack of enemy arty shelling the militia to extinction.

AI's "see"

Another situation...player AI again: My level 3 interceptor is sent on a scout mission. It overflies an enemy city. There is nothing there. no buildings either.

So I send 2 militia there to capture it. Route takes them through mountains. Should be stealthed all the way.

When my interceptor returns a few minutes later, low and behold there are enemy units now heading for that same city.