| Fallacy of Drawing an Affirmative Conclusion From a Negative Premise |
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| The conclusion of a standard form categorical syllogism is affirmative, but at least one of the premises is negative. |
| Examples: |
| All mice are animals, and some animals are not dangerous, therefore some mice are dangerous. |
| No honest people steal, and all honest people pay taxes, so some people who steal pay pay taxes. |
| Proof: |
| Assume that the premises are true. Find an example which allows the premises to be true but which clearly contradicts the conclusion. |