ad hocery

noun2

1. •
   (informal) Use of ad hoc or improvised reasoning.

   • We can, of course, simply drift into the future, in which case where we end up will be the result of inertia buffeted by ad hocery and circumstance. — 2011
2. •
   (informal) Arbitrary decision rules sometimes included in artificially intelligent software to simulate the unexpectedness in human reasoning.