Canada’s constitution, our most basic law, is both written and unwritten.
So what happened?
This is crisis #1: The constitution has been violated. (i.e. The unwritten convention of the independence of the Attorney General in criminal matters has been violated.)
How do you know what an unwritten constitutional convention is? It’s unwritten after all.
#1 Can the convention be articulated?
#2 Do the people in the political system act in conformity with the convention as articulated?
If not, then repeat Step #1 with different articulations until both Step #1 and #2 are “yes”.
This means that the unwritten part of our constitution can evolve. For better, for worse.