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Paul, "For purposes of the present argument, though, what is significant is that there is no sign in the picture in the head of either the ambiguity itself or of the act of repainting the picture as it goes from one stable state to the other."

Indeed it is amazing what the brain can do, interpreting the same shape ('fat or fit') in different ways. Being concerned about one's figure, where does the medical observation turn into the 'modical' one? Is there an intrinsic non-physical logical force shaping our polar variables and parallellisms that makes them fit the outside world, or would that rather be from the involuntary (or unconscious) sensor functions? I am tempted to say that this is the 'normal way' of seeing things that is fed (on topic!) forward or backward through communication, which would make it a story, but even more that this is 'normal science' or 'normal religion' with a solid empirical or teleologic base. So sports sciences would sanction the 'fat view' as being unhealthy but buddhism would sanctify it as imperative to the nirwanic state.