David Chapman says that achieving a particular level means that the skills associated with it become logically possible for you, which is distinct from actually mastering those skills; and that it’s possible for you to e.g. get to stage 4 while only having poor mastery of the skills associated with stage 3. So I would interpret “skipped stage N” as shorthand for “got to stage N+X without developing any significant mastery of stage N skills”.
David Chapman says that achieving a particular level means that the skills associated with it become logically possible for you, which is distinct from actually mastering those skills; and that it’s possible for you to e.g. get to stage 4 while only having poor mastery of the skills associated with stage 3. So I would interpret “skipped stage N” as shorthand for “got to stage N+X without developing any significant mastery of stage N skills”.