Philosopher's Quest

Syllogism Builder

A logic tool for analysing and evaluating syllogistic arguments. Enter the terms for the major premise, minor premise, and conclusion, select the proposition and assess the generated argument with an accurate Venn diagram.

Full mood and figure
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Argument

Barbara

Valid
Major Premise
Truth
Minor Premise
Truth
Conclusion
Therefore,
Truth
Unsound

Venn diagram

Shading marks empty regions. An × marks existence. A circled × marks unresolved placement across two or more unshaded regions.