> but it does have hierarchy defined by callee/caller relationships. If you have any kind of hierarchy at all in your program execution (even if its just rules

> but it does have hierarchy defined by callee/caller relationships. If you have any kind of hierarchy at all in your program execution (even if its just rules being used to for other rules...), you can leverage that as a "scope." This is so true. You can take advantage of having access to a "parent" to change context. It allows you to re-use your code by just accessing information from your parent. It does lead to some coupling (it limits what types of parents you can have) but it does let you re-use code. And hay Sean!