Alper riffs on a subject a guest brought up recently, that maybe the pushback you get during your presentation isn't about you, it is legitimate questions about your idea. We tend to take things personally (after all, we're human, at least most of us), but as Alper says, it's "crucial" to separate pushback related to you from pushback related to your idea, and to not get caught in the trap of feeling the need to justify yourself.