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open and shut
open and shut
if a legal case or problem is open and shut, the facts are very clear and it is easy to make a decision or find a solution The police think the case is open and shut: five witnesses saw the man stealing the car. It's going to take a lot of work to deal with this problem. It certainly isn't an open-and-shut matter.
open and shut
Simple, straightforward, easily solved, as in With three eyewitnesses, the prosecutor said this case was open and shut. This term suggests that one has immediate access to the facts of a situation. [c. 1840]