I'm with Roy Peter Clark: Palin's "Refudiate" is an unintentional malapropism, and a stroke of genius

She has minted a great new word, an amalgam of two words:

Repudiate

and

Refute.

A refutation is a falsification. There is no moral consonance associated with the term.

A repudiation is more of a moral condemnation.

So..

A Refudiation is a demonstration or proof of the falsity of the premises of an action or of a proposition as well as a demonstration or proof that the action or proposition is morally wrong or inadvisable.

Bam. Add it to the Webster's man.