We are pleased to announce that on Friday, October 20 at 17:30 (CET), Gonzalo Rodriguez-Pereyra (University of Oxford) will give the talk Bolzano on the Identity of Indiscernibles as part of the Lugano Philosophy Colloquia Fall 2023 organised by the Institute of Philosophy (ISFI) at USI. This hybrid talk will take place in room A.34, Red Building, USI West Campus and online via Zoom. If you are interested in joining it online, please write to events.isfi(a)usi.ch For more information: https://www.usi.ch/en/feeds/25721 Here is the abstract of the talk: I shall discuss an argument by Bolzano for the Identity of Indiscernibles. I will explain and reconstruct the argument, discuss the relationship of the argument with Leibniz's arguments and positions, and argue that the argument is invalid.