The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking, and its right to exist is coextensive with its power of resisting extinction by its rivals.
This is like my dad's race team where we had one Legend car. If we wrecked it, we couldn't race the next week unless we had enough parts to put it back together again.
Ideas are elusive, slippery things. Best to keep a pad of paper and a pencil at your bedside, so you can stab them during the night before they get away.
