".y" is in selma'o Y, not UI - can it really be negated?
Y shouldn't be negatable. Y is not negatable in actual usage. The Book does not mention Y being negatable. Jbofi'e thinks Y is negatable. Jordan tells me that the BNF disagrees. Hrm, looks like Y is not negatable.
Robin Turner IDMYO Bilkent Univeritesi Ankara 06533 Turkey