Software/Inheritance/Multiple/vs/Single/Multiple

• Choosing multiple inheritance means a class may name several parents and inherit members from each.
• Gains — an object that is several kinds of thing at once inherits from each kind directly, with no copied code and no wrapper objects.
• Costs — two parents can define the same member, and a shared ancestor can be reached by two paths, the diamond problem. Reading the class means knowing the resolution order to see where a member comes from.
• Too far — a tangled graph of parents where reordering the list of bases silently changes behavior.