The Big Lie Corollary

Hitler famously wrote and demonstrated in his political career:

'If you tell a big enough lie and tell it frequently enough, it will be believed.'

This is actually not true.  You also need to silence those who would point out that what you are saying is a lie.  This is how the left establishes false 'facts'.  For example:

Everyone knows that John F. Kennedy was assassinated due to Right Wing Hate in Texas rather than by a Communist recently returned from living in the Soviet Union who had applied to emigrate to Cuba and had recently attempted to murder General Edwin Walker, a key figure in the right wing John birch society.

Everyone knows that women don't lie about rape.  See this post.

Everyone knows that George W. Bush lied about weapons of mass destruction in Iraq, even when he simply quoted the German, French, Russian, British and American intelligence service assessments.

Everyone knows that discriminating on the basis of race is the key to eliminating discrimination on the basis of race.

Everyone knows that any disparity that disadvantages women must be due to oppression while any disparity that advantages women must be due to women's superior performance.  A corollary of this is that women are absolutely equal to men except where they're better.  And women should have the same rights as men except when they have more.

I bet you can come up with a bunch more.  It's fun.  In a sad, pathetic sort of way.  Heil Hitler.