In reply to @libraryncl
@nulibrs @nulibsage converse is not the same as the contrapositive. Opposite of that statement is "people who don't prefer screen are old"
In reply to @christianp
@nulibrs @nulibsage Whoops, I just gave you the contrapositive! Point was, "A implies B" does not mean that "not A implies not B"