None of these transformations is a perfect test, however.

Nobody here would say we have a perfect test.

I always thought it would be the perfect test to figure out if it really works or not.

The perfect test or scan may have been available, but the physicians never ordered it.

It isn't a perfect test, but the swamp is isolated enough so that only the students and instructor will be there.

You and I," he said with some dryness, "make a perfect test for anything.

"If we wait for the perfect test, we'd be waiting 10 years from now," says McPherson.

And voluntary gratitude is a perfect test, if you stop to think about it.

It's not a perfect test, and people are human.

The deserted island turned out to be a perfect Rorschach test.