Nitpicking - but actually in Go, multiple moves may have the same (maximal) value - and go is normally played with either a "ko" rule which says that the location of the last move played can make a difference - or a "superko" rule - in which case the entire history of the board can matter.
Yes, multiple moves with the same value are easily found in the opening - trivially from the symmetries on an empty board, and even after a few moves - and in the endgame, where the exact value of moves can be computed and is typically in single-digit points.
In the midgame though, wouldn't it be much more surprising to find two or more moves for one side which have exactly the same value - more than one "best move" - as all the symmetries have pretty much vanished by then ? I'll admit I haven't considered that deeply, just assumed it true.
The sup...
Tyler Cowen argues in a TED talk (~15 min) that stories pervade our mental lives. He thinks they are a major source of cognitive biases and, on the margin, we should be more suspicious of them - especially simple stories. Here's an interesting quote about the meta-level: