Outline Preliminaries Cantor’s Abstractionism Frege’s Own ‘Abstractionism’ and Criticism of Cantor’s Cantor’s C 2 re-interpreted Good Company Arguments A Cantorian Argument for HP Cantor’s Abstractionism and Hume’s Principle Claudio Ternullo (University of Barcelona), Luca Zanetti (IUSS, Pavia) December 10, 2020 Claudio Ternullo (University of Barcelona), Luca Zanetti (IUSS, Pavia) Cantor’s Abstractionism and Hume’s Principle