Narrowing is the process of taking a type that has a few possible options or a type that is sort of wide and making it more specific. predicates is just pretty much part of that all of this stuff today they're not they're not different things they are all part of narrowing types let's talk about that. We have an example that is going to be helpful for you to visualize it so I type in TypeScript if you've never used TypeScript before is sort of a way to describe the shape of a value in our case we'll use an object.