There was a hint, almost, that Grauel spoke with sure knowledge.

Now I speak with sure knowledge and what I say is the truth.

Was he only a man, judging by a woman's smile, or was the god speaking through him with certain knowledge?

I speak with knowledge, for these were the same eyes that smiled upon me in the cradle.

It is a subject about which I can speak with full knowledge if less than complete conviction.

She spoke more and more often, with increasing knowledge.

Grange spoke, without excitement, just with knowledge and quiet pessimism.

We spoke to people with knowledge of the initial Anonymous hack.

Nobody knew anything about it although they all spoke with great positiveness and strategical knowledge.

Or at least, I've never spoken to anyone with direct knowledge of such doings.