Saul Perlmutter is a 2011 Nobel Laureate, sharing the prize in physics for the discovery of the accelerating expansion of the universe. He is a professor of physics at the University of California, Berkeley, and a senior scientist at Lawrence Berkeley National Laboratory.
  
John Campbell is a professor of philosophy at the University of California, Berkeley. He has held Guggenheim and NEH Fellowships and served as President of the European Society for Philosophy and Psychology.
 
Robert MacCoun is a social psychologist, a professor of law at Stanford University, and a senior fellow at the Freeman Spogli Institute. He received the 2019 James McKeen Cattell Award for lifetime achievement from the Association for Psychological Science.