And if anyone can, he'll find what history would have been, or at least a plausible scenario.

The space agency, he said, "may have to live with several plausible scenarios" of what happened.

"I don't believe that is a plausible scenario," he said today.

For example one could create the following unlikely, however plausible scenarios.

Is there any plausible scenario for how Iraq can turn into a functioning society?

He presents a plausible scenario, but other questions go unanswered.

All this is not proven but should be mentioned as a further plausible scenario.

"No one in their right mind can believe this is a plausible scenario," he said.

It has occurred to me, and in some cases it's a plausible scenario.

Look, here's the most plausible scenario I can construct out of what you science types have given me.