Reply To: Question about required assumption (June 2007, S 3, Q 17) February 27, 2016 at 7:33 am #1535 LSAT DanParticipant This is similar to a natural tendency that people have to negate “all” and “none” and vice versa. Similarly, the negation of “all” is “not all,” and the negation of “none” is “some.”