Is Fuzzy Logic dead?

[CalMeacham]

@Trinopus

Many of our common-sense sets do not have sharp edges. I mentioned the set of “chairs” in another thread. The central core of the set is obvious: office chairs and kitchen chairs and big overstuffed living room chairs. But farther out toward the boundaries of the set, the definitions are fuzzy. Is a chaise-longue a “chair?” Is a “rocking chair” a chair? How wide, exactly, does a “chair” get before it becomes a sofa?

This idea of uniqueness in all individuals is not only true of the classifications of material science; it is true, and still more evidently true, of the species of common thought, it is true of common terms. Take the word chair. When one says chair, one thinks vaguely of an average chair. But collect individual instances, think of armchairs and reading chairs, and dining-room chairs and kitchen chairs, chairs that pass into benches, chairs that cross the boundary and become settees, dentists’ chairs, thrones, opera stalls, seats of all sorts, those miraculous fungoid growths that cumber the floor of the Arts and Crafts Exhibition, and you will perceive what a lax bundle in fact is this simple straightforward term. In co-operation with an intelligent joiner I would undertake to defeat any definition of chair or chairishness that you gave me.

H.G. Wells A Modern Utopia (1905)