Categorical Logic·Rules·Lesson 3 of 6

Venn Diagrams for Categorical Propositions

Teaches students to represent single categorical propositions with two-circle Venn diagrams, introduces the conventions for shading and 'x' marks, and sets up the three-circle diagram used in the next lesson for syllogisms.

← The Square of Opposition and Existential Import Categorical Logic: Terms, Classes, and Syllogistic Form Mapping Syllogisms: Major, Minor, and Middle Terms →

Student Pro

Unlock this lesson and the rest of the curriculum.

Free includes the entire Foundations unit plus the first lesson of every other unit. This lesson is in Categorical Logic: Terms, Classes, and Syllogistic Form; the rest of the unit, and every other unit, is Student Pro.

In this lesson · 7 sections · 5 worked examples · 4 practice activities

Why diagrams help
Representing A propositions: shade the S-only region
Representing E propositions: shade the overlap
Representing I and O propositions: place the 'x'
…and 3 more

$119/year

Under $10 a month, billed annually — or $14 month-to-month.

Every lesson in all 15 units
Unlimited detailed feedback on every written response
Full spaced-repetition queue and adaptive recommendations

Unlock with Student Pro Or $14/month

14-day refund on annual. Cancel anytime. No charge until you confirm at checkout. Already have Student Pro? Sign in.

Compare all plans Teaching a class? Team plans cover every student Back to Categorical Logic: Terms, Classes, and Syllogistic Form Curriculum