If the “universe” contains everything that exists, what can be outside it? If the answer is “Things that don’t exist”, then “multiverse” becomes an idea in the domain of psychology, not physics. Multiversality (2013)
In the past scientists have repeatedly reached “intellectual closure” on inadequate pictures of the universe, and underestimated its scale. Multiversality (2013)
The happy coincidences between life’s requirements and nature’s choices of parameter-values might be just a series of flukes, but one could be forgiven for beginning to suspect that something deeper is at work. That suspicion is the first deep root of anthropic reasoning. Multiversality (2013)