@anonymously99,
Quote:You have to want to understand to see correctly.
I wonder how may understand that "similarity" and "difference" are
functional and relative to acts of human cognition and social agreement.
Trivially,
any two focal items can simultaneously be classified as both similar and different. They are "similar" since they are
both subject to comparison, and they are "different" because
there are two of them. Between these two sides of a coin, the only deciding factor is
functionality - whether they both satisfy the contextual conditions for inclusion in a human category label acquired through socialization.
Note that in medieval times a rainbow had
four colors (in correspondence with the four Gospels). Later this increased to
seven to correspond the the notes on a musical scale (..."music of the spheres"...) with the help of the invention of the category "indigo".
Physical sameness=Functional equivalence.
As context changes, so do the criteria for "sameness".