Experts cannot say with certainty which populations have been hit by the deaths.
How can you tell with certainty which switch controls the light bulb?
But their certainty, which can spill into bravado, has stirred criticism even within their own ranks.
Of course we can't predict with certainty which forces will play major roles in shaping a life.
And the certainty, which contrasts with so much that is ambiguous and bedraggled in the world of people and society.
They say it is impossible to know with certainty which students they may "reasonably expect" to have academic responsibility over.
For most people, the sense of impending death exists as a dimly remembered certainty, which occasionally lurches into full view.
"We both need a certain amount of certainty, which gives us the opportunity and capability to plan," he said.
Nevertheless, existence of probability is different from substantial certainty which is an ingredient of intent to cause the harm which results from the act.
