R. Douglas Geivett
James L. Crenshaw
Stephen T. Davis
Nelson Pike
Antonio Rosmini
Peter R. Baelz
Gottfried Wilhelm Leibniz
Walter Sparn
Fritz Alfred Arthur Kuhn
Richard W. Kropf
Proclus Diadochus
P. T. Geach
W. Sibley Towner
Kenneth K. Pak
Daniel Howard-Snyder
Harold S. Kushner
Karl Mühlenhardt
Hubert Black
Albert W. J. Harper