you can never tell | you never can tellidiomPart oftellyou can never tell | you never can tellyou can never tell | you never can tell — idiomidiom1. You can never be sure because things are not always as they seem.1.idiomDefinitionYou can never be sure because things are not always as they seem.ExampleYou can never tell what the weather will be like.He might be friendly—you never can tell.