categorical proposition

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Venn diagrams of four categorical propositions.

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Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)

Falling Stars: 10 of the Most Famous Endangered Species

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

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Venn diagrams of four categorical propositions.

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Topics

particular proposition negative proposition indefinite proposition affirmative proposition universal proposition singular proposition universal negative proposition particular affirmative proposition particular negative proposition universal affirmative proposition truth tautology analytic proposition truth-value term propositional function connective modality Bridge of Asses converse

Key People

John Venn

John Venn

English logician and philosopher