But Mr. Hussein has built such an apparatus of enforcement that any challenge by Iraqis has seemed improbable.

Spock deduced that the ambassador or his staff had not bothered to devise a response for something that had seemed so improbable.

The alliances might once have seemed improbable.

If it had not seemed so improbable, one would have been convinced that they were his body.

A few months ago even, this would have seemed improbable.

The other comebacks that had brought the Mets to this point had seemed improbable.

The notion that they can continue indefinitely, without resolution, has seemed improbable.

His answers had seemed improbable, she said.

It seemed improbable, or was it?

But somehow these "rational" explanations had always seemed more improbable to me than the phenomenon they were attempting to explain away.