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That's quite a broad statement. I assume this is only for some very simple games.

I would love to see how _that kind of AI_ plays against person in DotA 2 or Starcraft 2.

I think an AI could be made to be pretty good at laning, at least against a static set of 1 or 2 opponents without others coming in.

Like the built-in AI in DOTA2, you mean?

The built-in DotA 2 AI is no near being good.