Yes I wan’t to keep it as deep. I just assumed (wrongly apparently) that lifting a paragraph selection would automatically put it in its own simpleAnswer (according to my schema).
Ok so this leads me back to my original issue on lifting, because lifting with depth 2* does insulate the selection in a paragraph in its own simpleAnswer but I cannot avoid splitting before/after the selection when the selection it at paragraph start/end because otherwise it would keep the text before/after in the same simpleAnswer. So the empty paragraph issue raises again (i.e. if I split from paragraph start the previous simpleAnswer will have an empty paragraph at its end, and conversely, see Split at paragraph boundaries leaves empty paragraphs before/after where you gave me the solution for split at depth 1).
*Sounds obvious when you know it, but there might be some misunderstanding when reading the docs about absolute depth (in document) dans relative depth (as parameters for perform some transformations). Both goes 0 to n, but not in the same direction, and this can be confusing for beginners. Maybe different terms should be employed to clarify things, such as “absolute depth” and “relative depth”. Just to let you know.