Giving actionable feedback

"Have you noticed what's lacking in your presentation?"

"No, what is it?"

"Why don't you take a wild guess?"

"I'd prefer if you just pointed it out."

"Did you even consider the feedback I gave you last time?"

"Honestly, I don't remember you giving specific feedback. Could you clarify?"

"Think harder. Doesn't it ring a bell?"

"I've been juggling so many tasks; specifics would help."

"The real question is, what isn't missing? When you figure that out, you'll have your answer."