Psychiatrist to patient: Maybe you don't have a complex. Maybe you are inferior.
If something is inevitable, it will happen
Trends that can't continue, won't.
If something cannot go on for ever, it will stop
Consumer: A person who is capable of choosing a president but incapable of choosing a bicycle without help from a government agency.
Economists are very good at saying that something cannot go on forever, but not so good at saying when it will stop.