Alan Guth

Alan Guth’s 1999 analysis of expanding pre-big-bang models

Guth concluded his study as follows: “In my own opinion, it looks like eternally inflating models necessarily have a beginning… As hard as physicists have worked to try to construct an alternative, so far all the models that we construct have a beginning; they are eternal into the future, but not into the past.”^[3]

(Refer to NPEG Chapter One, Section IV.D)