Brian Duignan
Encyclopædia Britannica Editor
Brian Duignan is a senior editor at Encyclopædia Britannica. His subject areas include philosophy, law, social science, politics, political theory, and religion.
Primary Contributions (192)
Venn diagram, graphical method of representing categorical propositions and testing the validity of categorical syllogisms, devised by the English logician and philosopher John Venn (1834–1923). Long recognized for their pedagogical value, Venn diagrams have been a standard part of the curriculum…
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Classic Closing Lines
Classical Composers
Famous Serial Killers
Odd Facts About Philosophers
Modern U.S. Political Scandals
Memorable Beginnings Vol. 2: Match the Opening Line to the Work
Memorable Beginnings Vol. 1: Match the Opening Line to the Work
9 Modern Corporate Criminals
Inventors and Inventions of the Industrial Revolution
Philosophers to Know, Part II
Philosophers to Know, Part I
Brain Games: 8 Philosophical Puzzles and Paradoxes
