Ludwig Wittgenstein
Herodotus
John Stuart Mill
Francis Bacon
Karl Popper
Stuart J. Russell
Irving Marmer Copi
Malcolm Gladwell
Kenneth H. Rosen
Thomas L. Floyd
George Boole
Immanuel Kant
Georg Wilhelm Friedrich Hegel
Ernest Nagel
George Pólya
Roland Barthes
Jerome Groopman
Ronald J. Tocci
Ontario.