Reductio Ad Hitlerum

What is reductio ad Hitlerum?

According to Wikipedia, reductio ad Hitlerum, Latin for “reduction to Hitler,” is a term coined by German-American philosopher Leo Strauss in 1951.  The idea is that in an argument, people invoke Hitler or Nazis to prove their point.

According to, one example is this:

Hitler was in favor of eugenics.
Therefore, eugenics is wrong.

However, here is a counter-example:

Hitler was a vegetarian.
Therefore, vegetarianism is wrong.

(Video by John Green)


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