Godwin's law (or Godwin's rule of Hitler analogies)[1][2] is an Internet adage asserting that "as an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches 1".[2][3] That is, if an online discussion (regardless of topic or scope) goes on long enough, sooner or later someone will compare someone or something to Adolf Hitler or his deeds, the point at which effectively the discussion or thread often ends.