Anyone with any sense could see at once that her husband had poisoned her. 
Any reasonable person could tell that her husband had killed her.
No one could have figured out that the husband had poisoned her.
A man is reading a book.
A woman is hiking at some landlocked mountains.
The man had a league of enemies.
Actual costs of emissions caps can be better isolated with this approach.
A dog is walking.
A family is posing for a picture.