> and your likelihood of ending up in either is 50%. I don’t quite agree with this characterization. You end up in both universes with 100% certainty, but ther

> and your likelihood of ending up in either is 50%. I don’t quite agree with this characterization. You end up in both universes with 100% certainty, but there will then be two of you, one in each universe. Where the likelihood again comes in, is when one of the two yous wonders in which branch they are located, and tries to predict (retrodict?) based on information collected prior to the branching, it will be a 50/50 likelihood. Of course, if they are able to look at the outcome of the experiment, it will become clear in which branch they are located. This concept of probability in the context of MW is known as “self-locating uncertainty”: https://www.journals.uchicago.edu/doi/10.1093/bjps/axw004 https://www.journals.uchicago.edu/doi/10.1093/bjps/axw004