Friday’s post “Many Worlds and Occam’s Razor” generated a lot of good discussion on Twitter over the weekend, with contributions from Philip Ball, Sabine Hossenfelder, Jim Baggott, and many others.
Much discussion focused on whether or not Occam’s Razor is useful (or is misused):
Sabine Hossenfelder criticized the Many Worlds Interpretation (MWI):
I know I've said this a seemingly endless times before, but here we go again. Postulating the "existence" of the other worlds is unnecessary to explain anything we actually observe and hence such a postulate is in conflict with Occam's razor/good science.— Sabine Hossenfelder (@skdh) August 10, 2019
Philip Ball and Jim Baggott had this exchange:
I think Jim makes an important point, which I emphasized here: