Video URL
https://pirsa.org/16030024Theoretical Structure and Theoretical Equivalence
APA
Weatherall, J. (2016). Theoretical Structure and Theoretical Equivalence. Perimeter Institute for Theoretical Physics. https://pirsa.org/16030024
MLA
Weatherall, James. Theoretical Structure and Theoretical Equivalence. Perimeter Institute for Theoretical Physics, Mar. 22, 2016, https://pirsa.org/16030024
BibTex
@misc{ scivideos_PIRSA:16030024, doi = {10.48660/16030024}, url = {https://pirsa.org/16030024}, author = {Weatherall, James}, keywords = {Quantum Foundations}, language = {en}, title = {Theoretical Structure and Theoretical Equivalence}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2016}, month = {mar}, note = {PIRSA:16030024 see, \url{https://scivideos.org/index.php/pirsa/16030024}} }
James Weatherall University of California, Irvine
Abstract
Our physical theories often admit multiple formulations or variants. Although these variants are generally empirically indistinguishable, they nonetheless appear to represent the world as having different structures. In this talk, I will discuss several criteria for comparing empirically equivalent theories that may be used to identify (1) when one variant has more structure than another (i.e., when a formulation of a theory has “excess structure”) and (2) when two variants are theoretically equivalent, even though they appear to represent the world differently. I will then discuss where this leaves the philosopher trying to use our empirically successful theories as a guide to the structure of the world.