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. 
The obvious deduction was clear to only me.
mnli hypothesis: The obvious deduction was clear to only me. premise: 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. 