This is actually what I have been doing in my real programming life, and it has been proved to be very efficient.

When I discuss with one person, or a group of people, for each key point, I always rephrase what I heard (obviously I interpreted it already), and ask the person to confirm.

At the end of discussion, I will again recap all what I got in my own words, and ask everybody in the room to agree or disagree.

By doing this, you largely reduce the chance of misunderstanding.