A abduction (Igor Douven) Abelard [Abailard], Peter (Peter King and Andrew Arlig) Abhidharma (Noa Ronkin) abilities (John Maier) Abner of Burgos (Shalom Sadik) Abrabanel, Judah (Aaron Hughes) abstract objects (José L. Falguera, Concha Martínez-Vidal, and Gideon Rosen) accidental properties — see essential vs. accidental properties action (Juan S. Piñeros Glasscock and Sergio Tenenbaum) joint — see