Yes, my point was that walking on your own has at least one well-known exception, and so of course no one would say that walking is any more than a fallible piece of evidence, a heuristic, a relatively reliable guide, a rule of thumb. You rephrasing it implied skepticism that it was ever fallible, so I brought up the exception (and particularly appropriate, note the mention of sex in the lede of the link).
Yes, my point was that walking on your own has at least one well-known exception, and so of course no one would say that walking is any more than a fallible piece of evidence, a heuristic, a relatively reliable guide, a rule of thumb. You rephrasing it implied skepticism that it was ever fallible, so I brought up the exception (and particularly appropriate, note the mention of sex in the lede of the link).