Also time constraints. It's possible to be much more precise even with informal language, but it would take forever. So, for efficiency, words don't really del

Also time constraints. It's possible to be much more precise even with informal language, but it would take forever. So, for efficiency, words don't really deliver an idea to the listener. Instead, it's assumed that the listener is working toward the idea through their own reasoning, and words fill in only the necessary gaps to help them get there or to help them get there more quickly. You more or less reverse engineer what their thought process must be, then you do a gap analysis between what they're probably thinking and what you want them to be thinking, and you give them the pieces of info necessary for them to make the leap.