I'm a slow learner in many practical applications. Frinstance, my grandson who fancies himself as a cook presented us yesterday with a sourdough loaf he'd cooked a day or so ago. A large round one. Now I tried sawing away at it with a serrated bread knife from the top down. After I'd nearly dislocated.my arthritic shoulder and not cut one slice, the penny dropped. I turned it on its side and sliced the lot in about 2 minutes. I did the same with pane. I'm used to having one of the cute Woolies girls slice it for me but they're having renovations and the bakery is closed