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Summa Logicae

Disciplines:
philosophy
logic

Summary

Ockham's comprehensive treatise on logic — the most systematic presentation of medieval nominalist logic, covering terms, propositions, and syllogistics.

Core Contribution

Nominalism formalized: general terms do not refer to real universals — they are mental or linguistic signs that signify many individuals. Suppositio theory: the theory of how terms refer in propositions. A complete medieval logic: terms, propositions, syllogisms, and fallacies treated with extraordinary rigor. The most complete presentation of Ockham's nominalist philosophy in technical form.

Historical Influences

Aristotle Peter of Spain

Intellectual Lineage

Scholastic LogicMedieval Nominalism

Allied Works

Opus Nonaginta Dierum Dialogus Quodlibetal Questions

Contemporaries & Peers

Opus Nonaginta Dierum Dialogus

Minds Influenced

Medieval Philosophy Modern Nominalism

Intellectual Posterity

Nominalism Philosophy of Language

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