Syllogistic fallacy

Short description: Logical fallacies that occur in syllogisms

Syllogistic fallacies are formal fallacies that occur in syllogisms. They include or :

Any syllogism type (other than polysyllogism and disjunctive):

* fallacy of four terms

Occurring in categorical syllogisms:

* related to affirmative or negative premises:
* affirmative conclusion from a negative premise
* fallacy of exclusive premises
* negative conclusion from affirmative premises
* existential fallacy
* fallacy of the undistributed middle
* illicit major
* illicit minor
* fallacy of necessity

Occurring in disjunctive syllogisms:

* affirming a disjunct

Occurring in statistical syllogisms (dicto simpliciter fallacies):

* accident
* converse accident

## See also

* Argumentation theory
* Syllogism § Syllogistic fallacies

## External links

* Fallacy files: Syllogistic fallacy
* Online Syllogistic Machine An interactive syllogistic machine for exploring all the fallacies, figures, terms, and modes of syllogisms.

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Formal fallacies

* Masked man
* Mathematical fallacy

In propositional logic|

* Affirming a disjunct
* Affirming the consequent
* Denying the antecedent
* Argument from fallacy

In quantificational logic|

* Existential
* Illicit conversion
* Proof by example
* Quantifier shift

Syllogistic fallacy|

* Affirmative conclusion from a negative premise
* Exclusive premises
* Existential
* Necessity
* Four terms
* Illicit major
* Illicit minor
* Negative conclusion from affirmative premises
* Undistributed middle

* Other types of formal fallacy
* List of fallacies

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