循環論證
循環論證（circular reasoning），又有譯做循環推理，係一種邏輯謬論，簡單講即係「自己話自己係」，舉一個例，有一個人自己寫咗本書，本書係講一種唔知乜嘢怪物，之後同人講話呢個世界有呢種唔知乜嘢怪物，人哋問佢點証實，佢就話係自己本書講，但本書根本係佢自己寫，然後又自己話係，咁就叫做循環論證。
另一個循環論證例子叫竊取論點（begging the question），簡單講即係以自己嘅結論去證明自己嘅論題，講一樣嘢之前已經假定咗一個大前提係啱，舉個例：「我哋一定要支持政府施政，確保社會安定」，但係政府施政未必實可以令社會安定，喺預先假定咗政府嘅決策一定唔會錯，然後叫人去支持政府，呢種就叫做竊取論點。
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