What can it be? I mused, won over to Poirot's views for the moment, although still retaining a faint conviction that the obvious deduction was the correct one. 
Slightly believing still that the obvious deduction was the right one.
I gave up all indication that the obvious deduction was correct.
If you buy items made in America, more money will go into taxes and you'll will spend less.
People are in a room.
Some people are on Mt. Everest.
The man is by a stream.
and respond to those needs in an effective manner.
A woman stands in front of a wall covered in pictures.