Yeah, it's a phrasing error... although there are species of inferred behaviors (he went into a room for an hour and then came out and walked to a store. I don'

Yeah, it's a phrasing error... although there are species of inferred behaviors (he went into a room for an hour and then came out and walked to a store. I don't know what he did in that room but I can infer that he breathed while in it, although as with all inferences that may be untrue.) I'm not arguing against revealed preferences as useful aggregate information regarding the probabilities of someone choosing X, I'm saying that you both can't know their intentions regarding those choices and more specifically those preferences are untrustworthy in predicting any single opportunity to choose X. The idiocy of many current products, be they physical or informational, is replacing the user's ability to make a choice with what the product designers believe... especially without explicit agreement. In most cases the user didn't opt-in to outsourcing or subordinating their decision-making to product X and every time their intent conflicts with the product's decision-making the user will become more discontented with the product.