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Politifact
A fact-checking resource examining statements of politicians when it is hard to distinguish what is true and what is false. Politifact has earned a Pulitzer Prize.
Khan Academy
Khan Academy: Necessary Assumptions Quick Guide
A quick guide to approaching questions that ask you to find an assumption required by the argument. This question asks you to identify the claim that must be true or is required in order for the argument to work. In other words, there is...