open and shut

Something that is "open and shut" is clear and simple. You can use the phrase "open and shut" to talk about a court case, for example:

It's an open-and-shut case, really. There were several witnesses, and the police matched the suspect to the murder weapon.

You can also use "open and shut" to talk about a debate:

No, there's no debate. It's open and shut. Software piracy is a form of theft, and it should be punished.

In this example, the speaker doesn't think that there is any value in the opposing argument at all.

This phrase appears in these lessons: