It is a false dichotomy to take it as a set
To take it as a set is false dichotomy.
blurred circle
https://gyazo.com/23a2844a878062ad4f0b486b815ae6f8
gradation So it is not uniquely determined where to draw the boundary line.
So different people have different boundaries.
narrow sense and broad sense
crisp set v.s. fuzzy set
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