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Semple was an advocate and translator of Kant.
Henry B. Veatch
Gershom Carmichael
Jennifer A. Frey
Alan Ryan
Aristotle
William Godwin
Sir James Mackintosh
Aeon J. Skoble
Jan Narveson
John Locke
Brian Satterfield
Luigi Turco
Eric Schliesser
Matt Zwolinski
David W. Carrithers
David Conway
Socrates
Plato
Boethius
Mortimer J. Adler
Alexander the Great
Epictetus
Jack Russell Weinstein
Plotinus
Ralph McInerny
Carlo Lottieri
Maia Cummings
Mo Tzu
Ayn Rand
Paul Carus
Thales
Peter Paul Seaton Jr.