But that empty cup and those crumbs were solid proof.

Those physical signs gave solid proof that she wasn't dreaming.

At least, that is, there's no solid proof in the mainstream media.

It's something we can look for, some solid physical proof.

The video has always been held out by Cornell as the most solid proof.

We might not find solid proof against the person who did it, but we'll probably get a likely suspect.

Of course, we blamed Buddy without having any solid proof.

"We do not have any solid proof to move in a particular direction."

But my own experience tells me to wait until we have real solid proof of whatever happened to Titan.

So far, neither of the committees has turned up solid proof to back the accusations.