I used just one unbreakable rule: The trail had to be fully prepared from one turnaround base to the next before a wagon was moved.

I've heard that he has only three unbreakable rules: Keep the streets well paved.

The team plays their beloved game according to five unbreakable rules: "1.

Wink had one unbreakable rule: Don't hurt the sheep.

First is our unbreakable rule that every candidate must be a trained trooper, blooded under fire, a veteran of combat drops.

But the one unbreakable rule among lifeloop actors was "The loop never stops."

No longer would people have to live under strict and unbreakable rules.

There's no such thing as an unbreakable scientific rule, because, sooner or later, they all seem to get broken.

There's no such thing as an unbreakable scientific rule.

For recipients, unbreakable rules of weddings are that if the wedding is canceled, the gifts must be returned to the givers, no exceptions.