Sentence examples for am not certain from inspiring English sources

I am not certain about it.

Why, I am not certain.

I am not certain about the first robot per se.

I am not certain about when this happened.

"In November or December, I am not certain which.

But I am not certain and I wish I was.

I am not certain what they mean by Washington.

"I am not certain that the president's statement is even admissible," he said.

I am not certain that we would have survived as a species without them".

I am not certain exactly where I lost it — my memory is blurred.

I have seen my share of parenting, and am not certain what to make of it.