Question: The physicist who made an argument with Enrico Fermi against the existence of extraterrestrial civilizations has described himself as what?
Sentence (from "Fermi paradox"): The Fermi paradox or Fermi's paradox, named after physicist Enrico Fermi, is the apparent contradiction between the lack of evidence and high probability estimates, for the existence of extraterrestrial civilizations.
Relevant evidence: Yes