Suppose you have a brother named Jimmy whom you love very much. One day, a crazy magician kills Jimmy, but then instantly replaces him with an exact copy. This copy is the same as Jimmy in every way, including implanted memories of the past. Would you still cry over Jimmy’s death?
According to Plato, you need not, because the copy reflects the form of beauty in the same way. Would you accept the substitute and love it just as you would the original? According to Plato, you should love them equally well. Many find this answer strange and therefore reject Plato’s theory.