"What might be learned today from Einstein's interface of physics and philosophy?", Stanford Linear Accelerator (SLAC) Colloquium, February 25, 2019.
"Hermann Weyl: symbolic construction from the purely infinitesimal and gauge invariance", Conference Hundred Years of Gauge Theories, Physikzentrum, Bad Honnef, Germany, July 31, 2018.
"Understanding gauge: Rovelli and Weyl", VIII Conference on Quantum Foundations: Quantum Logic & Quantum Structures, Universidad CAECE, Buenos Aires, Argentina, November 22, 2018.
"From spacetime to gauge (and back?)", First Chilean Conference on the Philosophy of Physics, Centro de Estudios Avazados y Extensión PUCV, Santiago, November 30, 2018.
"Einstein's 'God letter' (to E. Gutkind, 3 January 1954): Context, Content, Controversy", Instituto de Filosophia, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile, November 19, 2018; The Battery, San Francisco, November 2, 2018; & Pace Gallery, Palo Alto, October 25, 2018.
"A Critical Look at Inflationary Cosmology", 2015 Alberto Coffa lecture in the Department of History and Philosophy of Science, Indiana University, Bloomington; April 10, 2015.
"Antinomies of Eternal Inflation", Conference "Quantum Antinomies and Reality", Collège de Physique et de Philosophie, Fondation des Treilles, Tourtour, France; June 5, 2015.