One can only speculate on the Government's motives in doing this.

It is not straight history however, Cercas "enters people's minds and speculates on their motives."

One can only speculate on her motives for coming out.

He declined to speculate on the Libyans' motives in the encounter.

"Far be it from me to speculate on God's motives."

And I'm not here to speculate on his motives or put myself in the middle of your family business.

"I do not speculate on our customers and their motives," MacDonald said.

The police in Miami declined to speculate on the killers' motives.

I can't begin to speculate on his personal motives.

Mr. Bowers says he has speculated on his nemesis's motives, without coming up with a convincing theory.