make a case for
make a case for something
to explain why something should be done Everything seems to be going pretty well, and she has yet to make a case for change.
Usage notes: also used in the form make a case that (to explain that something is true): It is easy to make a case that he's one of the best baseball players around.
Etymology: based on the legal meaning of make a case (to show that what you say is true)
make (out) a case for something/doing something
to give good reasons why something should be done You've certainly made out a case for us buying a dishwasher.See I rest my case