Sounds about right. Frank Drake created his famous equation [1] to try to quantify the probability of detecting ETI, but you do need to make guesses at some of

Sounds about right. Frank Drake created his famous equation [1] to try to quantify the probability of detecting ETI, but you do need to make guesses at some of the inputs. [1] https://en.wikipedia.org/wiki/Drake_equation https://en.wikipedia.org/wiki/Drake_equation