Backed by Millie Syers, David asked alert questions about the equipment. Any containment spills? No. Souring trouble? Just the usual throwbacks to the wild state—tailored bacteria did tend to revert, after millions of generations. And wild bugs wouldn’t produce—they just ate goop and freeloaded. Left to multiply at the expense of the worthy, these backsliders would soon take over, so they were scorched from the tanks without mercy.