Rules without rulebooks

Authoring Inform 7
1

If there is a rule like this in an extension:

This is the crazy random rule:
	say "Can I be replaced?";

How might one replace this rule since it is not in a rulebook? Assume, let’s say for the sake of argument, that using a before statement completely messes everything up.

2

The “…does nothing if…” and “…substitutes for…” declarations in chapter 19.5 will work.

3

Thank you!