Utiliser "suss out" dans une phrase

1. To suss out the competition we became ‘spies’ at the school that two days previously had cancelled our presentation of Julius Caesar and watched our enemies present the same play! It was a company of older, experienced actors

2. What it came down to was that I had to learn every trick in the book and suss out the whole setup and the computer systems before I even attempted anything

3. Air escaping from wood? Continental drift? Mostly, though, he tried to suss out what was coming

4. The daily chart in the left pane is a mess; it is very hard to suss out any useful information from this chart—there are many competing and conflicting technical factors, and the best we can do is to label it some kind of trading range