Jump stop vs "up and down"

[just another ref]

Originally Posted by AllPurposeGamer

Casebook 4.44.2 Situation A: Dribbler A1 catches the ball with the right foot touching the floor and then jumps off that foot and alights on both feet simultaneously: (a) with feet parallel; or (b) with one foot in advance. Ruling: the positions of the feet has no significance, but they must come to the floor simultaneously. In both (a) and (b), it is a violation if A1 pivots on either foot.

In the ruling, A1 catches the ball with the right foot on the floor ending his dribble per 4-15-4(a) which states the dribble ends when "the dribbler caches or causes the ball to come to rest in one or both hands." A1 then jumps off his right foot and lands with both feet simultaneously.

Isn't that a case of a player ending his dribble and continuing on with a jump stop?

To most of us, yes.