Jisho

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Noun
1. theory of ideas; Platonic idealism
Wikipedia definition
2. Theory of FormsPlato's theory of Forms or theory of Ideas asserts that non-material abstract forms (or ideas), and not the material world of change known to us through sensation, possess the highest and most fundamental kind of reality. When used in this sense, the word form is often capitalized.
Read “Theory of Forms” on English Wikipedia
Read “イデア論” on Japanese Wikipedia
Read “Theory of Forms” on DBpedia

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