If someone falls asleep during a film, he or she does not see any of the film.
If you knew someone during your time at university, you still know them and are in contact.
In this case the statements are questionable, falling asleep 'during' a film doesn't mean that you slept through the whole film, therefore we can't say whether you saw any of the film or not.
In the same way, knowing someone 'during' your time at university does not mean that you necessarily still know or are in contact with them.
- For Teachers