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Which of the following is not true of unsound arguments?

All unsound arguments commit a formal fallacy.
If a deductive argument commits a fallacy, then it is an unsound argument.
Any argument that commits a formal fallacy is an unsound argument.
If a deductive argument has false premises, then it is an unsound argument.

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  1. Unsound arguments, are when the argument is valid but at least one of the premises is false, an invalid argument, or (if they’ve really messed up) the argument is invalid and at least one of the premises is false. To get knowledge of the conclusion, the argument needs to be sound.

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    PsyDAG

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