She would guess at the former, given his standard of living.
But in the real world, economic players can only guess at the future cost of living.
We don't need to guess at the effect of the performance.
She had to guess at the things he might be able to answer.
And perhaps we can even guess at the purpose, too.
Since we can only guess at the cause, I see no reason for me to continue with it.
Without power, he was afraid to guess at the things which were being kept from him.
I could not even guess at the level of this one.
But how was I to guess all these things at that time?
He could even guess at the real meaning of the words.