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Deductive Reasoning 2 http://www.khanacademy.org/video/deductive-reasoning-2 ------------------------------- يتناول هذا الفيديو حل مسألة حول الاستنباط المنطقي ------------------------------ شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org