The bun is something of a contradiction when it comes to being a hairstyle in that it is both cool and hot at the same time. (hercanvas.com)
As a side note, a multi billionaire with morals seems something of a contradiction, unless it's remorse. (arsenalarsenal.net)
Of course, some cynics might observe that there is something of a contradiction about a book written by a parliamentary hack for the discerning drinker! (totalpolitics.com)