Sentence examples similar to rules are indispensable from inspiring English sources

For rules of inference are indispensable for proof of any deductive conclusion.

New EU rules on firearms sales are "indispensable and urgent", the French document says.

All are indispensable.

Which works are indispensable?

Both worlds are indispensable.

Ferries are indispensable for transportation.

"None of us are indispensable.

The best entertainers are indispensable.

Experts are indispensable technicians.

Medical technologies are indispensable to modern medicine.

Boots are indispensable in the winter.