The Doctor, Nyssa and others in “Mawdryn Undead”

Well, there's a probability of anything. Statistically speaking, if you gave typewriters to a treeful of monkeys, they'd eventually produce the works of William Shakespeare.

Nyssa

[trying to draw the Doctor's attention away from his conversation with Tegan to the approaching craft on the viewscreen] Doctor...

Of course, you and I both know that at the end of a millennium they'd still be tapping out gibberish.

Tegan

And you'd be tapping it out right alongside them. I only asked you a simple question.