McKinsey & Company for its emphasis on PowerPoints. Underlying the PowerPoints, however, are the writing process and argumentation. McKinsey & Company encourages its employees to write because writing clarifies thinking. They also encourage their employees to use the rule of three, which states your argument should comprise three reasons—not two, not four. The number three makes your argument look convincing, concise, and coherent. It’s the number that has the most impact on people. Join The Word Leader Facebook Community to learn more about writing, connect with like-minded fellows, and get support in your writing journey.