Sam
has responded to critics who have raised the question of ambiguities:
"Of course, goals and conceptual definitions matter. But this holds for all phenomena and for every method we use to study them. My father, for instance, has been dead for 25 years. What do I mean by "dead"? Do I mean "dead" with reference to specific goals? Well, if you must, yes -- goals like respiration, energy metabolism, responsiveness to stimuli, etc. The definition of "life" remains, to this day, difficult to pin down. Does this mean we can't study life scientifically? No. The science of biology thrives despite such ambiguities. The concept of "health" is looser still: it, too, must be defined with reference to specific goals -- not suffering chronic pain, not always vomiting, etc. -- and these goals are continually changing. Our notion of "health" may one day be defined by goals that we cannot currently entertain with a straight face (like the goal of spontaneously regenerating a lost limb). Does this mean we can't study health scientifically? "