Sentence examples for be a closed wff from inspiring English sources

A wff containing no free individual variables is said to be a closed wff of LPC.

By prefixing to α two appropriate quantifiers and possibly one or more negation signs, it is possible to form a closed wff (called a closure of α) that will express a determinate proposition when a meaning is assigned to the predicate variables.

This is a closed world.

"It's a closed club.

Saudi Arabia is a closed society.

This is a closed case".

It is a closed loop system.

It's a closed art form".

"It's a closed chapter," he said.

All that remains is a closed gate.

Crimea is a closed subject".