permissions+example

Permission to update a given card is based on its *update rule.   A new Wagn comes with several update rules, including these two:

• All cards can be updated by Anyone Signed In.
• Layout cards can be updated only by Administrators.

By "Layout cards", we mean cards that have the type "Layout".   Since the set of "Layout cards" is narrower than the set of "all cards", the second rule overrides the first, and only Administrators are permitted to edit Layout cards.