A better example of begging the question.
In DesCartes early writtings he attempted to disprove the existence of god and in so doing proved the existence of god. Which raises the question of, How did DesCarte prove the antithesis of his point?
In his writtings DesCarte constantly referred to man being deceived because of differences in perception. In order to be deceived there must be a deceiver. However someone powerful enough to deceive all of humanity begs the question of, Isn't said deceiver a god themselves?