Simulate with the hypothesis and think about the hypothesis
Some people talking about something........ and you hear them.
You may.......can't understand that.
Basically, It is easier to understand someone's story if you know about that.
However, the most important thing to do after hearing is to use your own ideas (hypothesis) and simulate them.
Simulate based on your own ideas and think about the validity of those ideas.
If you can do that , you can easily improve your knowledge or skills.