Isn't there an example on Less Wrong? Yudkowsky assumed that, given a few clues, people would come by their own efforts to his "solution" to Free Will, a form of compatibilism. But they didn't and he was "forced to write it out in full". Presumably they didn't match his expectation because they had whatever values and intutiions that regularly make people choose other "solutions" such as scepticism and incompatibilist indeterminism. He assumed they would think similarly and they didn't.