I think it's valid since Life, in this case, extends Box of Chocolates and therefore "is a" Box of Chocolates. If Life had implemented the same interfaces or ex

I think it's valid since Life, in this case, extends Box of Chocolates and therefore "is a" Box of Chocolates. If Life had implemented the same interfaces or extended the same parent class as Box of Chocolates, then it would be a @simile as Life, in that case, would be "like a" Box of Chocolates.