Jisho

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Noun, No-adjective
1. proposition; thesis; notion; theory
2. problem; issue; challenge
Wikipedia definition
3. PropositionIn logic and philosophy, the term proposition refers to either (a) the "content" or "meaning" of a meaningful declarative sentence or (b) the pattern of symbols, marks, or sounds that make up a meaningful declarative sentence. The meaning of a proposition includes having the quality or property of being either true or false, and as such propositions are claimed to be truthbearers.
Read “Proposition” on English Wikipedia
Read “命題” on Japanese Wikipedia
Read “Proposition” on DBpedia

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