Plural of concrete; multiple instances of concrete material, or in philosophy, concrete objects as opposed to abstractions.
From Latin 'concretum' (grown together, solidified), the plural '-s' form. Can refer to the building material or to philosophical concrete particulars.
In philosophy of language, debating whether words refer to 'concretes' (actual objects) or abstractions is ancient—Plato said words point to abstract forms, while Aristotle insisted concrete particular things are real.
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