My point is this accidental selection bias doesn't depend on the crowd- you could just as easily make this mistake if you are 1 person in a room by yourself. So

My point is this accidental selection bias doesn't depend on the crowd- you could just as easily make this mistake if you are 1 person in a room by yourself. Some examples of what I would call unwisdom of crowds might be the biasing feedback effect a prediction market's current price has on people's judgement, or how those with the most money (or the with the smallest marginal value of a dollar) exert a larger influence on a prediction market's predictions, if they are implemented that way.