"more convincing case" is a grammatically correct and commonly used phrase in written English
It is typically used to compare two arguments or pieces of evidence, with one being more persuasive than the other. Example: "After presenting a variety of data and statistics, the researcher was able to make a more convincing case for the effectiveness of their proposed solution."
But Johnson delivered a far more convincing case in support of his demand for more playing time.
In any case, the 9-4X makes a more convincing case for Saab's survival than the mediocre (but also handsome) 9-5 sedan that preceded it.
None make a more convincing case for a 1930s revival than Vogue's swinging portrait of French café society of the Jazz Age, photographed by Steven Meisel.
Fewer examples more deeply explored might have added up to a more convincing case, and an easier read.That is a shame, because much of the material would repay a deeper look.
To build a more convincing case for faster action, a growing group of researchers is trying new ways of conveying the risks of certain emissions paths, including pinpointing when actions have to start to stabilize greenhouse gases at particular levels.
But they have managed to keep news of their differences to a minimum, and when they break into the open they have made a more convincing case that they are marshaling a diversity of views for President Bush to consider.
With a government-set yardstick for quality, Mr. Tozzi said, critics of regulations can now build more convincing cases showing that an agency was arbitrary and capricious in its choice of data.
A more convincing economic case for the project is needed.
Indeed, a far more convincing economic case can be made that America taxes its petrol too lightly than that Europe taxes it too heavily.
The more specific examples you have about your teacher's meanness, the more convincing your case will be.
More convincing are cases where Pennebaker and his fellow researchers catch on-the-fly changes in the way people connect with others, from lying to loving.
