I am quite sure he had no idea of what you meant." I had expected Poirot to be disappointed; but, to my surprise, he replied that that was as he had thought, and that he was very glad. 
I am quite sure he misunderstood what you meant.
I'm positive he knew exactly what you meant.
The children are studying in the library.
The two potters use sledgehammers to smash their creations.
The dog is purple
A single man is sitting at home alone watching football.
This evasion has a trouble, in fact macroeconomics is important.
A man is sitting on the ground, as his dog lays on a nearby bench.