Maybe exceptions can be coded to rules while creating a lesson ?
You may find it a little restrictive in the creativity department all through this track. There is a limited checking capability that is strict and narrowly scoped. Best be sure of the expectations and aim for that in exercises.
Expectations vary. Not every lesson is checked by the same method. This I'm sure is not meant to stymy creativity, as much as guide learners along a simple path. Once fulfilling exercises, we may continue to tinker with the code. Just don't expect a lot of code to make it past the SCT. If it runs without exception, the code may be fine.