But I'm sure you can figure out a way to test it.

What's the best way to test a novel before you read it?

But what's the most effective way to test for it?

"But there is an easy way to test the theory."

"Until now, there had been no way to test the truth of what he has to say."

The only thing he came up with was yet another way to test his theory.

But he could think of a way to test his idea.

There's no better way to test this theory than to just try it!

"You couldn't have found another way to test your theory?"

A third use would be a more specific way to test ideas about the cause of the disease.