Ben Zoma's mind raced from the impossible to the merely improbable.

The impossible was beginning to seem merely improbable.

But though such theories were never disproved in the primitive era, they gradually began to seem not merely improbable but ignoble.

That was not merely improbable, it was impossible.

That was the least unlikely theory of the four, not at all impossible, merely improbable.

The impossible often has a kind of integrity to it which the merely improbable lacks.

Merely improbable in Italy.

That would seem to be not merely improbable, as the whole experience was, but physically impossible without some kind of "sub-space" communication link.

"Not impossible, merely improbable," she reassured him, staring into his eyes.

Becoming a storyteller," he observes, "was adding what appeared impossible to what was merely improbable.