Prior Analytics
The two books investigate deductions whose conclusions follow necessarily from given premises. Aristotle organizes syllogistic figures, conversions of propositions and modal arguments, separating formal validity from the truth of premises.
Understanding the text
The work establishes a logic of terms whose categories do not map exactly onto contemporary symbolic logic.
Key points
- 01
Middle term
The shared term connects the extremes without appearing in the conclusion; its position distinguishes the syllogistic figures.
- 02
Validity
An argument may be correctly constructed while beginning with false premises; this distinction becomes a lasting analytical tool.
- 03
Modality
Necessity and possibility change the relations between premises and conclusions, creating problems absent from straightforward categorical syllogisms.
How to read it
Diagram the terms of the opening syllogisms and test counterexamples before approaching modal arguments.
Editions & sources
- Consult the reference 1classics.mit.edunew tab
- Consult the reference 2plato.stanford.edunew tab
- Consult the reference 3classics.mit.edunew tab
Summaries and key points are original editorial interpretations. They accompany reading the work and do not replace an edition of the text. Editorial method ↗