| Fallacy of Exclusive Premises | A standard form categorical syllogism has two negative premises (a negative premise is any premise of the form 'No S are P' or 'Some S is not P'). |
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| Examples: | |
| No Manitobans are Americans, and no Americans are Canadians, therefore, no Manitobans are Canadians. In fact, since Manitoba is a province of Canada, all Manitobans are Canadians. | |
| Proof: | |
| Assume that the premises are true. Find an example which allows the premises to be true but which clearly contradicts the conclusion. | |