"Have the brain" is a colloquialism commonly used to reference cognitive capability or intelligence. While it can be effective in conveying a message, it may not be the most professional or clear way of expressing oneself. Luckily, there are many alternative phrases that can be employed in its place. Some options include "possess mental acuity," "exhibit exceptional intellect," "display cognitive aptitude," or simply "be intelligent." These alternatives provide a more formal and precise expression of what was originally intended, making it easier for others to understand and respond to in a professional setting.