clipped from: en.wikipedia.org   

Godwin's Law (also known as Godwin's Rule of Nazi Analogies)[1] is an adage formulated by Mike Godwin in 1990. The law states:[2]


As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one.


The rule does not make any statement as to whether any particular reference or comparison to Hitler or the Nazis might be appropriate, but only asserts that one arising is increasingly probable. It is precisely because such a comparison or reference may sometimes be appropriate, Godwin has argued,[3] that overuse of Nazi and Hitler comparisons should be avoided, because it robs the valid comparisons of their impact.
clipped from: xkcd.com   
Regarding Mussolini