Or does the AI simply *always* know to send units (in appropriate force) to *exactly* where your vanguarded stalking units are to discover them? Every. Single. Time. Without. Fail?
Stalking units in general seem as though the AI always knows exactly where they are. It's kind of annoying.
Like... even if you put them in some really stupid out of the way place that makes no tactical sense, the AI goes there. So it's not as if the AI is actually just figuring "gee that's a good spot for an ambush"; it's that they *literally* know where your stalking units are.
Drives me nuts.