The phrase "hard evidence that" is grammatically correct and can be used in written English.
Example: The detective was able to gather hard evidence that linked the suspect to the crime scene.
Prosecutor Powell laid out on tape and in photographs hard evidence that would convince any jury.
Was he too eager to get the one piece of hard evidence that would turn his suspicions into proof?
The hard evidence that is presented at the hearings will be judged fully both by Congress and the American people.
We have seen no hard evidence that this will work.
What is the hard evidence that you actually recovered?
"But there's no hard evidence that they are involved".
I have actually no hard evidence that it was true".
It doesn't, and there is no hard evidence that he did.
Moreover, there's an absence of hard evidence that short-selling more broadly hurts otherwise healthy companies.
That was hard evidence that blood and syringes had spread other viruses.
Some of the information gathered has been the type of hard evidence that the police appreciate.
