He'd made it clear he considered my sister's case unsolvable and closed.

But this case was going to be tough-potentiallyunsolvable-fromthe very beginning.

There still remained the unsolvable problem of what she was to do.

But he had taught her to trust that no puzzle was unsolvable.

She did not reply at once, and her expression he found unsolvable.

Physical propriety could well be a problem, and a problem forever unsolvable.

This is no unsolvable problem if we face it wisely and courageously.

Her mind is like an unsolvable puzzle, and I must solve it.

But far from unsolvable, as this week's raft of news will show you.

To the native Mexicans he was a holy terror and an unsolvable riddle.

We toil at the problem because it has been hitherto unsolvable.

And the worst part is that most of us feel it is unsolvable.

Mostly because, in book form like this, they're utterly unsolvable.

And it begins to be a not-unsolvable puzzle, said Boston University gerontologist Thomas Perls.

The strangeness of the actions of Frederick's fraternity brothers made the affair more unsolvable.

Worth it just for the unsolvable puzzle at the end.