The stroke I described is not a push. Take the cue in your shooting hand . Your holding the cue one handed. Place the cue tip behind the cue ball, but not touching the cue ball.The cue tip is resting on the table surface.Gently tap the cueball with the cue tip.It's a momentary contact on the cueball.A legal stroke,as described in the rule books, is a momentary contact with the cue tip on the cueball.
I'm holding the cue in my right hand.The cue tip is on the table surface 1/2" behind the cueball. My shooting hand is 1 inch off the playing surface. I move the cue forward and make momentary contact with the cue tip to cueball. No upstroke.This is not a push shot if you only have momentary contact with the cue tip to cueball.