Use to stress the straightforwardness of a situation without complex reasons or factors. He failed the test, pure and simple.
Pro Tip 2/3
Rejecting excuses
Apply 'pure and simple' to dismiss any excuses or justifications for an action or event. You're late, pure and simple - no more excuses.
Pro Tip 3/3
Sarcastic tone
Can convey a sarcastic undertone when highlighting obviousness or dismissing flimsy explanations. It's laziness, pure and simple, not a strategic break.