gwern comments on Is Sunk Cost Fallacy a Fallacy? - Less Wrong

19 Post author: gwern 04 February 2012 04:33AM

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Comment author: AnnaSalamon 06 February 2012 01:27:40AM 6 points [-]

Any idea whether Go beginners' tendency to "throw good stones after bad" results from sunk cost fallacy in particular, or from wishful thinking in general?

Like, is the thought "I don't want my stones to have been wasted" or "I really want to have that corner of the board"?

Comment author: gwern 06 February 2012 01:47:44AM *  1 point [-]

It may be an example of a different bias at play, specifically confirmation bias: they don't realize that the stones are being wasted and can't be retrieved. For example, chess masters commit confirmation bias less than weaker players.

(It's not that the players explicitly realize that there are better moves elsewhere but decide to keep playing the suboptimal moves anyway, because of sunk costs which would be sunk cost bias; it's that they don't think of what the opponent might do - which is closer to 'thoughtlessness'.)