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The rich philosophical and mathematical disputes that took place between Isaac Newton and Gottfried Leibniz at the start of the eighteenth century have received more historical attention than any other exchange in the history of philosophy. Nevertheless, in this talk, Robert Iliffe discusses a prominent but neglected aspect of their disagreement, namely the mutual claim that their opponents’ conceptual foundations were fictional, and were the product both of diseased thinking and of illegitimately organized intellectual structures. Newton assailed Leibniz’s allegedly debased metaphysics in various prominent places, and mobilized allies such as Roger Cotes and John Keill to do the same. Nevertheless, by far the most sophisticated critique of illicit philosophical assumptions was launched against Newton by Leibniz in his correspondence with Samuel Clarke. In the Fifth letter to Clarke, Leibniz identified core Newtonian positions as infantile, vulgar, and profoundly irreligious, asserting that they were dangerous fictions that were less plausible and much less edifying than the rational romances of writers in the previous century. Although Leibniz saved his most potent intellectual weapons for his final letter to Clarke, Robert Iliffe suggests that his attack on the fictional status of Newton’s work was no mere codicil to his general critique of Newton’s philosophy, but instead lay at the heart of it. This famous debate, while of course somewhat sui generis, is indicative of more general and dynamic features of intellectual debate.

Event Speaker

Robert Iliffe, Professor of the History of Science at the University of Oxford

Event Information

This event is free and open to the public; Registration required. Please contact scienceandsociety@columbia.edu with any questions.

This event is part of the New York History of Science Lecture Series.

With responses from Mark Siderits (Illinois State University)

ABSTRACT: Buddhist philosophers often draw a distinction between two different kinds of truth: conventional truth (saṃvṭi-satya) and ultimate truth (paramārtha-satya). Abhidharma Buddhists philosophers typically understand this distinction in terms of an ontological distinction between two different kinds of entities: ultimately real entities (paramārtha-sat) and conventionally real entities (saṃvṛti-sat). Similar to contemporary philosophical discussions about ordinary objects, Buddhist philosophers debate the ontological status of conventional entities and the semantics of discourse concerning them. Mark Siderits (2015, 2021, 2022) has influentially argued for an eliminitivist position he calls “Buddhist reductionism” that interprets the Abhidharma position as one that denies conventional entities exist but that retains discourse involving apparent reference to them. However, in a recent article Kris McDaniel (2019), a prominent defender of ontological pluralism, challenges that view by proposing that the Abhidharma Buddhist distinction between conventional truth and ultimate truth be “defined up” from a more basic distinction between two different ways an entity can exist: conventionally or ultimately. In this paper I argue that Saṃghabhadra’s account of conventional reality and truth does lends itself well to McDaniel’s proposal but I will also argue that the account of conventional and ultimate truth that results differs in important ways from the models he offers. I will end by offering a modification of McDaniel’s account of conventional truth that is derived from Saṃghabhadra’s pluralist ontology. That view will, unlike the views suggested by both Siderits and McDaniel, allow for there to be ultimate truths about what is conventionally true.

Dinner will be kindly offered by the Columbia University Seminars. 

RSVP is required for dinner. Please email Lucilla with eating requirements at lm3335@columbia.edu. 

How does the imagination change us? Why should picturing ourselves a certain way have any real effect on what we are? These questions are central to debates in Buddhist tantric literature regarding the generation stage (utpattikrama), wherein practitioners visualize themselves as buddhas ensconsed in magnificent mandala-palaces. For some, this practice is what sets Buddhist tantra apart: through this “yoga of the imagination,” as David Shulman puts it, a practitioner can achieve buddhahood in a single lifetime. And yet, as the Buddhist tantric author Indrabhūti (8th century) argues, a pauper who imagines himself to be a king does not thereby become one—so, in the same way, practitioners who visualize themselves as buddhas will not thereby become buddhas. The mental imagery (ākāra) involved in this practice is just so much unreal fabrication. Why should it have real transformative effects? I’ll consider here how these debates played out in Sanskrit Buddhist tantric texts from the 10th–11th centuries. I’ll focus on early authors in the Kālacakra tradition, who upheld Indrabhūti’s critique of the generation stage, and authors like Ratnākaraśānti, Vāgīśvarakīrti, and Advayavajra (aka Maitrīpa), who each in their own way critiqued mental imagery yet defended the importance and effectiveness of generation-stage practice. In the first part of the paper, I’ll consider arguments against mental imagery as these appear in generation-stage practice texts and the early Kālacakra tradition. In the second part, I’ll turn to why we might think unreal mental imagery can nevertheless have real transformative effects, paying special attention to the ways Buddhist tantric authors writing in Sanskrit take up ideas from the tradition of dramatic theory (nāṭyaśastra) and Sanskrit culture more broadly.

With responses from Thomas Yarnall (Columbia University)

DATE: February 2nd, 2024

TIME: 5:30 pm EST

LOCATION: Philosophy Hall, Room 716, Columbia University

1150 Amsterdam Ave, New York, NY 10027

NOTE ON ENTRY FOR NON-COLUMBIA GUESTS: The door to Philosophy Hall will only open with a Columbia University ID card. If you do not have this card please arrive early where someone will be standing outside until the meeting begins. If you arrive late, you can ask someone walking nearby to let you in or contact Cole at cf2798@columbia.edu. Please only contact Cole as a final resource so as not to interrupt the talk.

NOTE REGARDING DONATIONS: Due to COVID-19, donations are only accepted through Columbia University’s secure online giving form, Giving to Columbia.

RSVP is required for dinner. Dinner will take place at a nearby restaurant. Please contact Cole at cf2798@columbia.edu for further information.

ACCESSIBILITY STATEMENT: Columbia University encourages persons with disabilities to participate in its programs and activities. The University Seminars’ participants with dis- abilities who anticipate needing accommodations or who have questions about physical access may contact the Office of Disability Services at 212.854.2388 or disability@columbia.edu. Disability accommodations, including sign-language interpreters, are available on request. Requests for accommodations must be made two weeks in advance. On campus, seminar participants with disabilities should alert a Public Safety Officer  if they need assistance accessing campus.

PLEASE VISIT OUR WEBSITE: https://universityseminars.columbia.edu/seminars/comparative-philosophy/

(Please do not reply to this announcement. You may contact the Co-Chairs using the link above.) 

Comparative Philosophy Seminar:

• January 19 – Alex Watson (Ashoka University)
• February 2 – Davey Tomlinson (Villanova University)
• April 5 – Laura Specker (Fordham University)
• May 3 – Daniel Stephens (University at Buffalo)

Verity Harte is a specialist in ancient philosophy, with particular research interests in ancient metaphysics, epistemology and psychology, especially of Plato and Aristotle. She is the author of Plato on Parts and Wholes: The Metaphysics of Structure, and is the editor of several important books on ancient philosophy.