 In 1989, the Garland Publishing Company brought out a 15-volume collection of major works on Berkeley; Pappas' paper "Abstract ideas and the 'esse is percipi' thesis" was included in the third volume, as it was considered to be a significant contribution to Berkeley scholarship.Pappas developed his treatment of Berkeley's "esse est percipi" principle to repudiate the "inherence interpretation of Berkeley", upon which Edwin E. Allaire, among others, elaborated.That account is put forward to answer an extremely perplexing question in the history of philosophy