User:Ailenwi24033901/List of Syllogisms

This is my project and will be finished. If you know the basics of a categorical syllogism, please don't hesitate to pull out a pen and paper and find out the validity and which rules are broken, if any.

I am creating this page because no such one exists on the internet anywhere. This PDF is clearly unfinished and has not been worked on in some time.

A Standard Form Categorical Syllogism is an argument containing two premises and one conclusion. There are four types of arguments: an Universal and a Particular Affirmative, and an universal and particular Negative. These arguments are named the A, E, I, and O arguments, respectively. Within the two premises there are the middle term, major term, and a minor term (N.B. in standard form the major term is always the Predicate and the minor term is always the Subject in the conclusion). Additionally, there are 4 positions in which the middle terms can be arranged (see the respective tables below).

Because there are four possible arguments in premise one, four possible arguments in premise two, and four possible arguments in the conclusion, as well as four possible arrangements of the middle term, there are exactly two-hundred and fifty-six possible forms of categorical syllogisms. A list of them follows.

Syllogistic Fallacies

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There are traditionally five rules that determine validity of an argument, and six rules in modern logic. If a syllogism breaks any one of these rules it is inherently invalid and commits the associated fallacy. They are:

  1. Fallacy of equivocation
  2. Fallacy of the undistributed middle
  3. Illicit major or Illicit minor
  4. Fallacy of exclusive premises
  5. Affirmative conclusion from a negative premise or Negative conclusion from affirmative premises
  6. Existential fallacy (n.b. this fallacy is only present in Boolean logic and not in Aristotelian logic; rule six should not be considered unless rules 1 through 5 have passed. Additionally, the box labeled "6" cannot be determined valid or invalid based solely on the form of the argument: the Existential import must be determined. Thus, all of the boxes labeled "6" are filled with a "?")

In this list, rule one is not included because all syllogisms in the list meet the criteria for rule one.

First Position Middle Term

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Premise 1 Argument Type Middle Term Copula Major Term
Premise 2 Argument Type Minor Term Copula Middle Term
Conclusion Argument Type Minor Term Copula Major Term

AAA-1 through OOA-1

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAA 1            
AEA 1            
AIA 1            
AOA 1            
EAA 1            
EEA 1            
EIA 1            
EOA 1            
IAA 1            
IEA 1            
IIA 1            
IOA 1            
OAA 1            
OEA 1            
OIA 1            
OOA 1            

AAE-1 through OOE-1

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAE 1            
AEE 1            
AIE 1            
AOE 1            
EAE 1            
EEE 1            
EIE 1            
EOE 1            
IAE 1            
IEE 1            
IIE 1            
IOE 1            
OAE 1            
OEE 1            
OIE 1            
OOE 1            

AAI-1 through OOI-1

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAI 1            
AEI 1            
AII 1            
AOI 1            
EAI 1            
EEI 1            
EII 1            
EOI 1            
IAI 1            
IEI 1            
III 1            
IOI 1            
OAI 1            
OEI 1            
OII 1            
OOI 1            

AAO-1 through OOO-1

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAO 1            
AEO 1            
AIO 1            
AOO 1            
EAO 1            
EEO 1            
EIO 1            
EOO 1            
IAO 1            
IEO 1            
IIO 1            
IOO 1            
OAO 1            
OEO 1            
OIO 1            
OOO 1            

Second Position Middle Term

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Premise 1 Argument Type Major Term Copula Middle Term
Premise 2 Argument Type Minor Term Copula Middle Term
Conclusion Argument Type Minor Term Copula Major Term


AAA-2 through OOA-2

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAA 2 Example Example Example Example Example Example
AEA 2 Example Example Example Example Example Example
AIA 2 Example Example Example Example Example Example
AOA 2 Example Example Example Example Example Example
EAA 2 Example Example Example Example Example Example
EEA 2 Example Example Example Example Example Example
EIA 2 Example Example Example Example Example Example
EOA 2 Example Example Example Example Example Example
IAA 2 Example Example Example Example Example Example
IEA 2 Example Example Example Example Example Example
IIA 2 Example Example Example Example Example Example
IOA 2 Example Example Example Example Example Example
OAA 2 Example Example Example Example Example Example
OEA 2 Example Example Example Example Example Example
OIA 2 Example Example Example Example Example Example
OOA 2 Example Example Example Example Example Example

AAE-2 through OOE-2

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAE 2 Example Example Example Example Example Example
AEE 2 Example Example Example Example Example Example
AIE 2 Example Example Example Example Example Example
AOE 2 Example Example Example Example Example Example
EAE 2 Example Example Example Example Example Example
EEE 2 Example Example Example Example Example Example
EIE 2 Example Example Example Example Example Example
EOE 2 Example Example Example Example Example Example
IAE 2 Example Example Example Example Example Example
IEE 2 Example Example Example Example Example Example
IIE 2 Example Example Example Example Example Example
IOE 2 Example Example Example Example Example Example
OAE 2 Example Example Example Example Example Example
OEE 2 Example Example Example Example Example Example
OIE 2 Example Example Example Example Example Example
OOE 2 Example Example Example Example Example Example

AAI-2 through OOI-2

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAI 2 Example Example Example Example Example Example
AEI 2 Example Example Example Example Example Example
AII 2 Example Example Example Example Example Example
AOI 2 Example Example Example Example Example Example
EAI 2 Example Example Example Example Example Example
EEI 2 Example Example Example Example Example Example
EII 2 Example Example Example Example Example Example
EOI 2 Example Example Example Example Example Example
IAI 2 Example Example Example Example Example Example
IEI 2 Example Example Example Example Example Example
III 2 Example Example Example Example Example Example
IOI 2 Example Example Example Example Example Example
OAI 2 Example Example Example Example Example Example
OEI 2 Example Example Example Example Example Example
OII 2 Example Example Example Example Example Example
OOI 2 Example Example Example Example Example Example

AAO-2 through OOO-2

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAO 2 Example Example Example Example Example Example
AEO 2 Example Example Example Example Example Example
AIO 2 Example Example Example Example Example Example
AOO 2 Example Example Example Example Example Example
EAO 2 Example Example Example Example Example Example
EEO 2 Example Example Example Example Example Example
EIO 2 Example Example Example Example Example Example
EOO 2 Example Example Example Example Example Example
IAO 2 Example Example Example Example Example Example
IEO 2 Example Example Example Example Example Example
IIO 2 Example Example Example Example Example Example
IOO 2 Example Example Example Example Example Example
OAO 2 Example Example Example Example Example Example
OEO 2 Example Example Example Example Example Example
OIO 2 Example Example Example Example Example Example
OOO 2 Example Example Example Example Example Example

Third Position Middle Term

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Premise 1 Argument Type Middle Term Copula Major Term
Premise 2 Argument Type Middle Term Copula Minor Term
Conclusion Argument Type Minor Term Copula Major Term


AAA-3 through OOA-3

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAA 3 Example Example Example Example Example Example
AEA 3 Example Example Example Example Example Example
AIA 3 Example Example Example Example Example Example
AOA 3 Example Example Example Example Example Example
EAA 3 Example Example Example Example Example Example
EEA 3 Example Example Example Example Example Example
EIA 3 Example Example Example Example Example Example
EOA 3 Example Example Example Example Example Example
IAA 3 Example Example Example Example Example Example
IEA 3 Example Example Example Example Example Example
IIA 3 Example Example Example Example Example Example
IOA 3 Example Example Example Example Example Example
OAA 3 Example Example Example Example Example Example
OEA 3 Example Example Example Example Example Example
OIA 3 Example Example Example Example Example Example
OOA 3 Example Example Example Example Example Example

AAE-3 through OOE-3

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAE 3 Example Example Example Example Example Example
AEE 3 Example Example Example Example Example Example
AIE 3 Example Example Example Example Example Example
AOE 3 Example Example Example Example Example Example
EAE 3 Example Example Example Example Example Example
EEE 3 Example Example Example Example Example Example
EIE 3 Example Example Example Example Example Example
EOE 3 Example Example Example Example Example Example
IAE 3 Example Example Example Example Example Example
IEE 3 Example Example Example Example Example Example
IIE 3 Example Example Example Example Example Example
IOE 3 Example Example Example Example Example Example
OAE 3 Example Example Example Example Example Example
OEE 3 Example Example Example Example Example Example
OIE 3 Example Example Example Example Example Example
OOE 3 Example Example Example Example Example Example

AAI-3 through OOI-3

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAI 3 Example Example Example Example Example Example
AEI 3 Example Example Example Example Example Example
AII 3 Example Example Example Example Example Example
AOI 3 Example Example Example Example Example Example
EAI 3 Example Example Example Example Example Example
EEI 3 Example Example Example Example Example Example
EII 3 Example Example Example Example Example Example
EOI 3 Example Example Example Example Example Example
IAI 3 Example Example Example Example Example Example
IEI 3 Example Example Example Example Example Example
III 3 Example Example Example Example Example Example
IOI 3 Example Example Example Example Example Example
OAI 3 Example Example Example Example Example Example
OEI 3 Example Example Example Example Example Example
OII 3 Example Example Example Example Example Example
OOI 3 Example Example Example Example Example Example

AAO-3 through OOO-3

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAO 3 Example Example Example Example Example Example
AEO 3 Example Example Example Example Example Example
AIO 3 Example Example Example Example Example Example
AOO 3 Example Example Example Example Example Example
EAO 3 Example Example Example Example Example Example
EEO 3 Example Example Example Example Example Example
EIO 3 Example Example Example Example Example Example
EOO 3 Example Example Example Example Example Example
IAO 3 Example Example Example Example Example Example
IEO 3 Example Example Example Example Example Example
IIO 3 Example Example Example Example Example Example
IOO 3 Example Example Example Example Example Example
OAO 3 Example Example Example Example Example Example
OEO 3 Example Example Example Example Example Example
OIO 3 Example Example Example Example Example Example
OOO 3 Example Example Example Example Example Example

Fourth Position Middle Term

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Premise 1 Argument Type Major Term Copula Middle Term
Premise 2 Argument Type Middle Term Copula Minor Term
Conclusion Argument Type Minor Term Copula Major Term


AAA-4 through OOA-4

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAA 4 Example Example Example Example Example Example
AEA 4 Example Example Example Example Example Example
AIA 4 Example Example Example Example Example Example
AOA 4 Example Example Example Example Example Example
EAA 4 Example Example Example Example Example Example
EEA 4 Example Example Example Example Example Example
EIA 4 Example Example Example Example Example Example
EOA 4 Example Example Example Example Example Example
IAA 4 Example Example Example Example Example Example
IEA 4 Example Example Example Example Example Example
IIA 4 Example Example Example Example Example Example
IOA 4 Example Example Example Example Example Example
OAA 4 Example Example Example Example Example Example
OEA 4 Example Example Example Example Example Example
OIA 4 Example Example Example Example Example Example
OOA 4 Example Example Example Example Example Example

AAE-4 through OOE-4

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAE 4 Example Example Example Example Example Example
AEE 4 Example Example Example Example Example Example
AIE 4 Example Example Example Example Example Example
AOE 4 Example Example Example Example Example Example
EAE 4 Example Example Example Example Example Example
EEE 4 Example Example Example Example Example Example
EIE 4 Example Example Example Example Example Example
EOE 4 Example Example Example Example Example Example
IAE 4 Example Example Example Example Example Example
IEE 4 Example Example Example Example Example Example
IIE 4 Example Example Example Example Example Example
IOE 4 Example Example Example Example Example Example
OAE 4 Example Example Example Example Example Example
OEE 4 Example Example Example Example Example Example
OIE 4 Example Example Example Example Example Example
OOE 4 Example Example Example Example Example Example

AAI-4 through OOI-4

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAI 4 Example Example Example Example Example Example
AEI 4 Example Example Example Example Example Example
AII 4 Example Example Example Example Example Example
AOI 4 Example Example Example Example Example Example
EAI 4 Example Example Example Example Example Example
EEI 4 Example Example Example Example Example Example
EII 4 Example Example Example Example Example Example
EOI 4 Example Example Example Example Example Example
IAI 4 Example Example Example Example Example Example
IEI 4 Example Example Example Example Example Example
III 4 Example Example Example Example Example Example
IOI 4 Example Example Example Example Example Example
OAI 4 Example Example Example Example Example Example
OEI 4 Example Example Example Example Example Example
OII 4 Example Example Example Example Example Example
OOI 4 Example Example Example Example Example Example

AAO-4 through OOO-4

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(Form) Rule broken
Figure Mood Validity 2 3 4 5 6
AAO 4 Example Example Example Example Example Example
AEO 4 Example Example Example Example Example Example
AIO 4 Example Example Example Example Example Example
AOO 4 Example Example Example Example Example Example
EAO 4 Example Example Example Example Example Example
EEO 4 Example Example Example Example Example Example
EIO 4 Example Example Example Example Example Example
EOO 4 Example Example Example Example Example Example
IAO 4 Example Example Example Example Example Example
IEO 4 Example Example Example Example Example Example
IIO 4 Example Example Example Example Example Example
IOO 4 Example Example Example Example Example Example
OAO 4 Example Example Example Example Example Example
OEO 4 Example Example Example Example Example Example
OIO 4 Example Example Example Example Example Example
OOO 4 Example Example Example Example Example Example