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It only gets more and more fuzzy and actually obstructs not only research but also common-sense action
Agree. Recently, I was arguing something opposite when I heard somebody discussing this in a political context rather than scientific or logical. They were saying exactly what you are with regards to middle ground and progress. I guess they had a point there. Extremism on a political scale is equally unhelpful. I was trying to make the case that there are certain times and situations perhaps when you actually might need extreme action and reverse course. I guess I didn't make the case well, and the OP probably thought I was just trying to play devil's advocate.
I was just looking at the term 'fuzzy logic' as I kind of forgot what that pertained to (I have no math background) but thought it quite interesting again.
Fuzzy logic and vagueness
Modeling reasoning with vague predicates and propositions is often cited as the main motivation for introducing fuzzy logics. There are many alternative theories of vagueness, but there is a general agreement that the susceptibility to the sorites paradox is a main feature of vagueness. Consider the following version of the paradox: 10100 is a huge number. If n is a huge number, then n−1 is also huge. On the face of it, it seems not to be unreasonable to accept these two assumptions. By instantiating n with 10100 in and applying modus ponens ... we conclude that 10100−1 is huge. By simply repeating this type of inference we arrive at the unreasonable statement 0 is a huge number.
Yeah, there's a lot to be said for a common sense being under-rated IMO.