====== Modus Fesapo ======
Form of a [[glossary:syllogism|syllogism]] based on the [[logic:inferences:modus_ferio:index|Modus Ferio]], in which a negative [[glossary:existential_quantification|existential]] proposition is inferred from each negative and affirmative [[glossary:universal_quantification|universal]] premisses. This form has an additional existential requirement.
> No P is M.
> All M are S.
> [and there exists at least one M]*
> Therefore, Some S are not P.
For example:
> No circle is a square.
> All squares are rectangles.
> [and there exists at least one square]*
> Therefore, Some rectangles are not circles.
===== Name =====
The name "Fesapo" is a [[wp>Mnemonic|mnemonic]] term that helps to remember the most important characteristics of this mode: The "F" at the beginning indicates that it is related to the [[logic:inferences:modus_ferio:index|Modus Ferio]], while the vowels indicate the types of statements used in the form: "e" and "a" stand for a //negative// and //affirmative// [[glossary:universal_quantification|universal]] premisses and the "o" for a negative [[glossary:existential_quantification|existential]] conclusion.
===== See also =====
* [[glossary:existential_import|Existential import]]
* [[glossary:existential_quantification|Existential quantification]]
* [[logic:inferences:modus_ferio:index|Modus Ferio]]
* [[glossary:syllogism|Syllogism]]
* [[glossary:universal_quantification|Universal quantification]]
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