The phrase "a great proof of" is correct and usable in written English.
It can be used to indicate strong evidence or demonstration of a particular quality, fact, or achievement.
Example: "Her dedication to the project is a great proof of her commitment to excellence."
Alternatives: "a strong indication of" or "a clear demonstration of".
"AAQ was a great proof of principle, but not really practical as a drug," Kramer says.
It is also a great proof of the power people can have if they stick together and challenge lies, and how important it is to support one another.
But he also called the study a "great proof of principle," and said, "Any whisper of hope to women who suffer from endometrial or ovarian cancer would be most welcome".
"What they did in Washington is a great proof of concept, but you're not likely to see this kind of technology widely used anytime soon," said Rick Nicholson, an energy technology analyst at IDC, a research firm.
"If Stanford proves that online high schooling can work for the high end, then that's a great proof of concept," said Mr. Levy, who is now a partner in a venture fund that invests in education companies, many of them for-profit or online.
Still, a great proof of concept and something most of us would love to play with.
"It's a great proof-of-principle," he added.
"This is a great proof-of-principle that you can develop small molecules to fight Plasmodium in the liver, and one could now have a campaign looking specifically for inhibitors against this protein," Derbyshire said.
The ability to be fast, funny and endlessly entertaining on a daily basis is a rare talent, but it is possible (the Wendy's Twitter account is a great proof-of-concept for this one).
There are a lot of cat videos that garner massive viewership, but that's not necessarily something that translates in to a great proof-of-concept idea for a feature film.
'On behalf of all those still forced to live with poverty, we can and we must ask from the rich countries a greater proof of brotherhood.
