Selecting a single artificial intelligence (AI) stock to buy right now is a difficult task. Every stock has its bear and bull cases, but the key is to find one with a far more certain bull than bear case. If I use those criteria to select my top AI stock to buy right now, I come up with Taiwan Semiconductor Manufacturing (TSM 2.44%) as my top pick.Regardless of what computing hardware a company uses for AI, the road likely leads back to Taiwan Semiconductor. Management is also incredibly bullish on the futu ...