I think that the problem is that the sorites paradox continues to manifest even if it is applied only to a <i>single</i> person.  Any reasonable person will agree that one grain of sand is not a heap, and that some sufficiently large pile of sand will a heap; but I think that few reasonable people would be able to pinpoint, either <i>a priori</i> or <i>a posteriori</i>, any <i>particular</i> number of grains as constituting the minimal possible heap.<p>If you apply this probabilistic interpretation to a single person, then your conclusion is that even <i>individuals</i> (rather than communities) attach words to concepts only probabilistically, which is not a paradox but is, I think, rather disturbing.