Getting up and drawing a Venn diagram is a great way to appear smart. It doesn’t matter if your Venn diagram is wildly inaccurate, in fact, the more inaccurate the better. Even before you’ve put that marker down, your colleagues will begin fighting about what exactly the labels should be and how big the circles should be, etc. At this point, you can slink back to your chair and go back to playing Candy Crush on your phone.