Say you have eight books of equal size on a shelf. It's easy to put these eight books on another shelf of equal size or larger. If you have a shelf holding thir

Say you have eight books of equal size on a shelf. It's easy to put these eight books on another shelf of equal size or larger. If you have a shelf holding thirytwo books, it is impossible to fit them all on the smaller shelf, so it's better to simply not do it.