She almost got to the point of feeling the appropriate shame about her gross fatness. Then the confirmation bias kicked in and she quickly concluded that it was the chair's fault. An opportunity was missed there, if someone had bluntly told her that it was not the fault of the chairs, which were very likely designed to comfortably fit the asses of +2 standard deviations from the average ass size. Cognitive dissonance must be induced in these people, and people with other fucked up beliefs, so that they can be confronted with the fact that reality differs from their stupid ideas, and it is not reality that is wrong.