Still, I'll not speculate upon the cause of my own good fortune.

They were discussing the cases passed, and speculating upon those to come.

As for defining time, or speculating upon its nature, forget it.

Its last chapter speculates upon the future of human cognition.

He felt the tiny talisman and speculated upon its importance.

The committee also said it "will not speculate upon motives" in the release of the documents.

I like to speculate upon the glorious future of man.

Then it is useless to speculate upon these matters any longer.

It's not in my nature to speculate upon such matters.

As he stood speculating upon the identity of this forgotten city, a voice spoke to them from above.