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July 8, 2022

Added the fifty-first Freethinker Podcast YouTube third interview with Jason Thibodeau on 4-dimensional cubes (2022) to the Freethinker Podcast page under Resources on the Secular Web.

Join host Edouard Tahmizian in this about 30-minute interview with returning Cypress College philosophy professor Jason Thibodeau as they outline the fascinating properties of a 4-dimensional spatial cube, or tesseract, by first considering how a creature living in Flatland, a 2-dimensional universe consisting of only length and width, would react to an intersection with that universe by a 3rd-dimensional object or entity. With this analogy to higher-dimensional space in mind, the interlocutors consider how we 3-Drs would react to the intervention of an 4-D being into our 3-D universe. Carl Sagan had suggested that although a Flatlander would not be able to perceive the 3-dimensional height of a 3-D creature, Flatlanders might be able to perceive its 2-dimensional shadow. The discussion turns to whether or not Sagan was right about this: would a 2-D creature actually be able to perceive anything from a 3-D object or entity? If so, what would it be able to perceive? Would it even be conceptually possible for a 3-Dr to exist in a 2-D space, or for a 4-Dr to exist in a 3-D space? If not a 4th spatial dimension, what is it that massive objects curve when they curve spacetime, according to Einstein’s theory of general relativity? Check out this mind-blowing discussion of modality, conceivability, and possibility!