Matter is conserved. The fundamental substratum of Nature is conserved. Every event has a cause. No effect can precede its cause. All bachelors are unmarried.
All bachelors are misogynists.
All cats are mammals. There is an external world. Light travels in straight lines in a vacuum. The standard metre is one metre long. Motion is continuous, i.e. a moving body can t pass from a to z without passing through the points in between.