The phrase "a rational case for" is correct and usable in written English.
You can use it when presenting a logical argument or justification for a particular position or action.
Example: "There is a rational case for implementing renewable energy sources to combat climate change."
Alternatives: "a logical argument for" or "a sound justification for".
And Jon Huntsman's rep, a real estate developer named Frank Levy, made such a rational case for the former governor of Utah that I allowed myself to believe he had a chance.
It's hard for the world's leading designer, Tom Ford, to make a rational case for his new spring clothes when corporate profits are down and anti-globalization protesters are on the march here, and even harder when some of the most beautiful women on earth have to struggle to keep their fannies covered.
Bbar didn't say what he did with the money raised from selling shares, but nobody could make a rational case for that kind of disclosure.
The Lib Dem Chief Secretary to the Treasury Danny Alexander told the GMB union's conference earlier this month that there would be no change without strong evidence, and a rational case, for proceeding.
13): "It's not easy to make a rational case for buying shares that have gone up a lot unless there is some new information to justify the price rise.
Robert L. Bixby, executive director of the Concord Coalition, a nonpartisan budget watchdog group, said, "There's a rational case to be made for adding a drug benefit to Medicare as a matter of health policy".
Magic in the Moonlight is Allen's most gratifyingly airy concoction in a while, but it's also a comedy that insists, in the end, on making an overly rational case for the power of the irrational.
For instance, few would assert that there is still an extant rational case for belief in phlogiston — any explanatory work it did at the proximate level seems to have ceased, and deeper explanatory uses for it have never subsequently materialized.
A rational case can be made that this was mistaken, or even immoral.
Users can build an evidence-based, rational case for cost-effective new services that can be presented to health authorities.
