You say three sides, but in fact all four sides are defined by the Law 1 diagram.Three sides of the 22m area is bounded by its 22m and touch lines. Therefore, I think it can be assumed that beyond these lines can be properly designated as being ‘outside the 22’.
What do you mean by "roll back in touch"? Is this the situation where the ball crosses the touchline outside the 22 but continues to roll until it is past (an imaginary extension of) the 22m line?I'm merely reiterating my original point #65, Davet, that should the ball roll back in touch the QT would be thrown in 'from outside the 22'. Law19.1 (b) could then be quoted to confirm that a subsequent direct kick to touch would be a 'no-gainer', the NH view.
The basis of the NH point of view, to which Ian also subscribes, is that if the ball goes into touch outside the 22, it never went into the 22 before it went dead. Therefore the kicker could not have put it there, so the person throwing must have done.