Contrapose

We certainly do not want to take our simple categorical statements and contrapose them into cumbersome natural language.

Source: wiktionary

To contrapose an argument one swaps the conclusion with any one of the premisses and negates each of the swapped statements.

Source: wiktionary

But subjunctive conditionals do not contrapose, and we are misled into accepting a sensitivity condition by confusing it with a safety condition.

Source: wiktionary

At such moments, King was contraposed against the more frightening threat, his symbolism making the radicalism of the other party all the more apparent.

Source: wiktionary