fast rules in a sentence

Examples

1. This cautiousness was not always a hard-and-fast rule.
2. I think this basically means there is no hard-fast rule.
3. :I doubt there is any hard-and-fast rule.
4. No hard and fast rule will do; use your good judgment.
5. There is no hard and fast rule for what constitutes a stub.
6. However, that was not a hard-and-fast rule.
7. :There is no hard and fast rule for something like this.
8. There are no hard-and-fast rules.
9. A : There is no hard and fast rule.
10. There is no hard-and-fast rule.