I laughed with him at the improbability of such things befalling.
Improbability is not a scientific notion; it varies with the individual.
And life not being a fairy-tale the improbability of the event almost shocked me.
But I will not rest either on improbability, or argument, or even denial.
Brown had refused his consent on the ground of improbability.
He never rejected a story on the score of its improbability.
She hesitates just a little, then solaces herself with the improbability.
The improbability of these various assumptions is very great.
Do not be influenced by the probability or the improbability of your reading it.
There was neither impossibility nor improbability in any of the three propositions.