WHAT'S HARDER TO DO?

A friend of mine recently completed his novel. It's not what you think exactly. He conceived of the idea and helped shape it, I guess, but hired someone to write it for him. He's put both his and her name on the MS coverpage though. So here's my question for all of you:Which is harder--writing the story or coming up with the idea?My friend will tell you it's coming up with the idea. My