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Here are explanations of all types of proposition problems using Venn diagrams. I hope this helps. Problem-solving Q&A Naver Cafe https://cafe.naver.com/bongbongtv Problem-solving Q&A Open KakaoTalk Room (Chat x, Participation Code 1994) https://open.kakao.com/o/gZ6IAMAb Job Chat Open KakaoTalk Room https://open.kakao.com/o/gkUZ8mCb #PropositionProblem #PropositionVennDiagram #NCSProblemSolvingAbility