The phrase "a proven case" is correct and usable in written English.
It can be used when referring to a situation or example that has been demonstrated to be valid or effective through evidence or experience.
Example: "The study presented a proven case of the effectiveness of the new treatment in reducing symptoms."
Alternatives: "a verified instance" or "an established example."
It is not yet a proven case.
but it "accepts in some cases where all alternatives have failed that there may be a proven case for it".
"If deterrence methods and all alternatives fail, and there is a proven case for control methods, we urge people to use only humane methods and trained, experienced professionals". Video Have seagull attacks left the birds misunderstood?
However, there is not yet a proven case of any of these Helitron- or Pack-MULE-generated "new" genes having actually acquired a genetic function essential to its host.
The theory is that gas bubbles rising to the surface could sink an unfavorably-positioned ship, some scientists have speculated, though a proven case of that happening has never been recorded.
When considering our study patients with M.pneumoniae pneumonia we felt safe to designate patients with a positive PCR result from respiratory samples as a proven case of M.pneumoniae infection.
PURPOSE: To report an immunohistochemically proven case of a coinfection of the retina by Epstein-Barr virus and cytomegalovirus in a patient with acquired immunodeficiency syndrome (AIDS).
We present a case of lymph node infarction detected in association with disseminated intravascular coagulation in a serologically proven case of Dengue fever.
We report a biopsy proven case of acute kidney injury due to acute interstitial nephritis associated with use of cefepime for treatment of mastoiditis and temporal bone osteomyelitis.
Instead, the morning was a riveting portrayal of his interactions with the president in what amounted to a possible, though not proven, case of obstruction of justice.
One probable breakthrough aspergillosis occurred in the micafungin arm and three in the fluconazole arm where an additional four proven cases occurred (P = 0.071).
