The Gallery Logic Hannes Leitgeb Werner Leinfellner Jonathan Lear Morris Lazerowitz Jean Ladrière Henry E. Kyburg Jr. Martha Kneale Martin Hollis Carl Gustav Hempel Patrick Aidan Heelan Errol Harris Anil Gupta Warren Goldfarb Roger Gibson Richard Gaskin Frederic Fitch José Ferrater Mora Delia Graff Fara Carolyn Eisele Jude Patrick Dougherty Philippe Devaux Michael Detlefsen Irving Copi Alan Code 1 2 3 4 5 6 7 8 9