It has been said that a game of Go is a conversation with moves in different areas showing disagreement. The game is also known as 'shou tan' (hand talk). From the commentary, AlphaGO is currently passing the Go Turing Test in almost all cases. There are some moves which some say are uncharacteristic, then later play out well. Or so called mistakes not affecting the outcome of the match. One explanation given was that AlphaGo optimizes for a win, not win by greatest margin, which is a/most valid for human or machine.