Universals

After Kant, the problem of universals becomes a problem of human psychology and questions about conceptual models we use to understand universals, rather than the same old metaphysical arguments about what universals "really" are.

Idealists do not reject universals as arbitrary names; rather, they treat universals as fundamental categories of pure reason (or as secondary concepts derived from those fundamental categories).

Moderate realists hold that there is no realm in which universals exist, but rather universals are located in space and time wherever they are manifest.

Plato's examples of what we might today call universals included mathematical and geometrical ideas such as a circle and natural numbers as universals.

Though illness and death may be the universals of earthly existence, the way that we get sick—and, sometimes, get better—has everything to do with the luck of the moment.

Plato, then, is what’s known as an “ultra-realist,” for universals, for him, aren’t just real.

According to Ockham, universals are just words/names that only exist in the mind and have no real place in the external world.

All forms of knowledge representation must deal with this aspect and most do so with some variant of set theory, modeling universals as sets and subsets and definitions as elements in those sets.

Ancient thought Plato Plato believed there to be a sharp distinction between the world of perceivable objects and the world of universals or forms : one can only have mere opinions about the former, but one can have knowledge about the latter.

Aristotelian realism, on the other hand, is the view that universals are real entities, but their existence is dependent on the particulars that exemplify them.

Aristotle argued that there are no universals that are unattached to existing things.

Aristotle, Metaphysics VIII 1045a–b Universals and particulars main Aristotle's predecessor, Plato, argued that all things have a universal form, which could be either a property, or a relation to other things.

Armstrong The Australian philosopher David Malet Armstrong has been one of the leading realists in the twentieth century, and has used a concept of universals to build a naturalistic and scientifically realist ontology.

Berlin/Kay found universal typological color principles that are determined by biological rather than linguistic factors.sfn This study sparked studies into typological universals of color terminology.

Characteristics that have been demonstrated to be cross cultural human universals such as smiling, crying, facial expressions are presumed to be evolved psychological adaptations.

Contemporary realists agree with the thesis that universals are multiply-exemplifiable entities.

Emotions across languages and cultures: diversity and universals.

Forms main Plato's interpretation of universals is linked to his Theory of Forms in which he uses both the terms εἶδος main (eidos: "form") and ἰδέα main (idea: "characteristic") to describe his theory.

Furthermore, "sexual restrictions" is one of the universals of culture peculiar to all human societies.

He located a number of interesting potential universals as well as many strong cross-linguistic tendencies.