一道逻辑题

bloodsuckcn

the reason much refrigerated food spoils is that it ends up out of sight at the back of the shelf. so why not have round shelves that rotate? because such rotating shelves would have just the same sort of drawback, since things would fall off the shelves'edges into the rear corners.
which of the following is presupposed in the argument against introducing rotating shelves?
answer:refrigerators would not be made so that their interior space is cylindrical.

Kilroy

答案说：冰箱内部不能做成圆柱体的。
如果里面是圆柱状，装了圆形的搁板就不应该有EDGE了

tongxun

就是说，若是圆柱状内部，就不会things would fall off the shelves'edges into the rear corners.