AbdulAlhazred
Legend
I would suggest a perusal of the history of science, my friend. Extrapolation is very seldom 'blind', it is almost entirely a matter of taking an observation and interpreting it in an existing context. This is basically how most of science has always worked. Newton say an apple fall, and then IN LIGHT OF ALL HIS OTHER EXPERIENCE, some of which was quite different from falling apples, was able to conceive of a general law covering ALL motion, both terrestrial and celestial. Obviously this wasn't instantly apparent to everyone who heard the idea, but if you read Principia Mathematica its pretty hard to fail to appreciate that it really works!You've shifted goalposts, but we can address this anyway. For analysis to occur you have to have a deeper base of examples to compare against or a theory to evaluate against. Both require more that a single example and are, in fact, testing a general theory against a specific example. Exploration of capacity requires some understanding of the prevalence of the capacity, else this argument suggests it's prefecture fine to, say, create a 7 finger glove company because the only man you met had 7 fingers. The reality here is that while humans have the capacity to have 7 fingers, it is an extremely rare mutation and one that has no regular expression when it happens. Blind extrapolation from specific examples to general assumption is not valuable.
My point is, in light of the present discussion, it seems perfectly OK to take an example, and given our collective understanding of RPGs and etc. to draw some conclusions. We may well want to test them further, they are hypotheses, not settled law. But at some point we either have to play out entire campaigns and debate each point again and again in light of 1000 examples of play, or else draw some conclusions with the understanding that there may be further exceptions, detail, etc. inherent in the whole corpus of play.