| Paragraph 1 | To convert a syllogism means to alter the conclusion and make another syllogism to prove that either the extreme cannot belong to the middle or the middle to the last term. |
| Paragraph 2 | If the conclusion is converted into its contradictory, the syllogisms will be contradictory and not universal. |
| Paragraph 3 | In particular syllogisms when the conclusion is converted into its contradictory, both premisses may be refuted, but when it is converted into its contrary, neither. |
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created 1996/11/25 modified 2009/04/26