How We Think At the heart of any compelling CEU is good storytelling. Since most of your audience will be visual thinkers, the imagery in the presentation needs to say more than it shows. The famous philosopher Ludwig Wittgenstein noted that “What can be shown, cannot be said.” This means that certain concepts or truths can only be understood through experience or demonstration, and cannot be fully expressed through language alone. A dynamic lunch and learn is much more memorable that one in which the presenter speaks in a monotone voice.