As I recall -- and I don't have the book in front of me -- the Robot's presence was explained as being a reasonable proxy for having a person present. The in-s

As I recall -- and I don't have the book in front of me -- the Robot's presence was explained as being a reasonable proxy for having a person present. The in-story thinking was that if the robot survived with no positronic damage, a person would likely survive too as the positronic and biological brains were of equivalent complexity and sensitivity.