His performance was perfect and without blemish.

In mathematics, a perfect number refers to a number where the sum of its divisors, excluding the number itself, equals the number.

He is immersed in the study of panmagic squares.

This fish is completely farmed, and no capture is done in the natural environment.

Our proposal was approved by unanimous consent.

He always strives for consistency in his words and actions.

This text is written according to the principle of unity of spoken and written language.

I make a sandwich every morning.

I like making sandwiches.