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Never posted on this stack site before, so I hope I'm not being rude.

I would like to know what bias, fallacy, or combination thereof is involved in the case of treating a (probably rotating) group of people as a single person against which you judge yourself.

Positive example: the very smart members of an online forum discuss a wide range of topics. You read the forum, not paying attention to who is posting any given response, and feel lacking in intelligence by comparison to this theoretical brilliant person who has something to say about every topic. Consequentially you feel stupid.

Negative example: you walk past an ice cream shop every day and look in the window at the patrons, who are different every time. You wish you, too, could eat ice cream every day. Consequentially you over-indulge in ice cream.

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One way that one could get around such confusions is to acknowledge the abstraction which comes from ignoring identity, and think in terms of societies. For example: the internet forum is inhabited by a society of people who engage in a high quality of discussion, so that participating meaningfully in that society would involve meeting that norm. At the ice-cream stand, one can recognise that eating ice-cream is a popular activity in society, while recognising that only a tiny fraction of society is at the stand at any given time, so that most of society must do it infrequently. –  Niel de Beaudrap Jan 11 '13 at 18:00
Definitely, I don't disagree. And thank you for the response. But what I'd like to know are specific names for the fallacy (or fallacies) involved. For instance, it seems like it might be some odd combination of hasty generalization and the fallacy of composition... but I'm outside my field, only knowing these terms from Wikipedia. –  user2980 Jan 11 '13 at 19:13
Ah, yes. I don't know if it's any sort of classic or named fallacy; though it seems like something closely related to the Hasty Generalization fallacy. –  Niel de Beaudrap Jan 11 '13 at 19:56

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