And that does two things: bug one, it helps catch bugs in your code, and secondly it often converts it into a more efficient sequence of instructions before you actually go off and run it. All right?

One comes from a bug called Clostridium propionicum, another two more from Cupriavidus necator.

The POLA states that a system should be partitioned into components in such a way that an inevitable bug in one component cannot propagate into another component and do damage there.