The phrase "a necessary case" is correct and usable in written English.
It can be used when referring to a situation or instance that is essential or required in a particular context.
Example: "In legal discussions, a necessary case must be established to support the argument being made."
Alternatives: "an essential instance" or "a required example".
I have a necessaries case that came from an old camping kit.
Only by engaging with the powerful forms and methods of inquiry developed by science can religion make a credible (and necessary) case for its continued relevance to modern society.
As such, these providers may get the necessary case volume to become proficient with these procedures.
In a necessary relationship, cases with the outcome of interest are a subset of the cases with the condition(s) of interest.
The literature reports a range of necessary cases per item required for adequate factor analysis ranging from 4 to 10 cases per measure [ 29- 31].
Mr. Lockhart said the town used a duel alert system — the horns and radio pagers — to notify firefighters, and that the horns were a necessary backup in case the pagers did not work.
The Eritrean government justifies national service as a necessary precaution in case of fresh conflict with neighbouring Ethiopia – the countries remain in dispute after a 1998-2000 border war killed tens of thousands of troops.
Elicitability is a necessary property in case of comparative back-testing between two risk measures, but does not affect an individual measure's backtestability.
So, whatever technology they may or may not have used was neither a necessary nor sufficient case for getting to the outcome that they got to, but having people who wanted change was.
The analysis of both raw and percent scores is widely employed in mouse studies [60], [62], [65], [66], [67], [68] as a necessary precaution in case experimental groups show large differences in their startle reactivity.
