Compelling
Answer the question with passion and credibility so that the reader is forced to either: 1) agree with your argument, 2) disagree with your argument, but concede it has merit.
How to do this? Your essay needs to build momentum, like a wave building and crashing over a beach. Your introduction sets the scene, repeated credible claims are supported with reasoned evidence, connections are made that build momentum, opposition is brushed aside as counter-claims are refuted and after your wave crests and breaks, it comes to rest satisfyingly in the conclusion, your reader/surfer moved from point A to point B, seeing the world in a whole new way.