When your assumptions have error bars of greater > 100%. Or even 1000%. Which makes for negative probabilities. Maybe that works, like the mathematical concept of i, which is defined as the square root of -1?
Oooops, there I go down the digression path. Here’s the quote:
The paper—which hasn’t been peer-reviewed—is called “Estimating the Prevalence of Malicious Extraterrestrial Civilizations” and was written by Alberto Caballero, a PhD student in conflict resolution at the University of Vigo in Spain and the author of a separate study published in Cambridge University’s peer-reviewed International Journal of Astrobiology earlier this month that attempted to analyze where the famous WOW! Signal originated. [Vice]
And it’s just gotta be asked – are these peers going to be representatives of the Malicious Extraterrestrial Civilizations?
How did the editor contact them?