There were other possibilities but for the moment these seemed the most plausible.

That seemed the most plausible theory, yet he could not content himself with it.

Although the most plausible explanation is probably the combination of both.

"So you think the virus theory is the most plausible?"

The most plausible explanation is simply that he did not have access to a good enough photograph at the time.

"He is the most plausible, but it may not be so simple as all that."

The most plausible answer to all of this is also the least dramatic.

As for the second reason, it seems the most plausible.

However, his marriage seems to be the most plausible explanation.

The most plausible future is for Britain to become more focused on professional services.