Based on 1. the biomechanics involved in one full turn cycle (one full chain of movement left and right), 2. the mechanical operation of the ski (tipping, bending, carving) 3. the geometry of a turn (shape, direction) and 4. The physics of a ski turn (building and release of forces), it should be quite clear where one turn ends and another begins. What has changed with the development of modern high performance carved turns is that, because the ski is now always turning and no longer floating in a straight path before picking up the next turn, the transition for many is no longer considered a phase but rather a single mark in the turn characterized by any one of the four measurements listed above. Good carving is all about spreading the forces of the turn as evenly as possible. We now have dynamics like the weighted transitions required for the constantly carving ski. Any time we are fully unweighted, we are going straight. We no longer want to go straight in between turns but rather ‘always be turning’. We regulate the magnitude of pressure by tipping the ski rather than pushing on it. Rolling the ski now never hesitates in transition between turns and only hesitates (generally) in turn phase two (apex) for turn shaping and choosing direction of release. Talking about fast tipping transitions, for many, the perfectly flat spot in their ski track transitions are actually shorter than the length of the ski, which means the entire ski is never fully flat at the same time. I believe that this is the continuity people are making note of in trying to make what sense can be made of the question.