The thirteenth task is to change what has settled into place. Someone with it is recognised at once: they argue with the accepted order not out of stubbornness but because they can see where it has gone out of date.
Agreeing comes harder to them than objecting, and that is a working property rather than a character trait. Their business is to find what it is time to replace, and to replace it.
Professionally the task is carried out through the new: technologies, approaches, ways of doing the familiar differently. Where what already exists has to be maintained unchanged, the thirteenth suffers and makes those around it suffer.
The risk is an obvious one — breaking what works simply because it is somebody else's. The task is carried out when things are better after the change, and not merely different.
