I think the core thing is that if you have a bug in the declarative code, it usually affects everything and can be fixed in the execution engine, or you didn't actually declare what you wanted but something else.
By contrast, bugs in imperative code can manifest simply because you happened to write it in such a way that relied on some assumption that no longer holds and your imperative code does something it should not do because its preconditions are invalid.
Declarative approaches are generally more robust because they by necessity tend to be designed to handle more diverse initial states and still reach the correct result.
By contrast, bugs in imperative code can manifest simply because you happened to write it in such a way that relied on some assumption that no longer holds and your imperative code does something it should not do because its preconditions are invalid.
Declarative approaches are generally more robust because they by necessity tend to be designed to handle more diverse initial states and still reach the correct result.