I went to the secondhand goods shop to look for old furniture.

This programming language is said to be Turing complete.

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.

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

He is immersed in the study of panmagic squares.

He is a perfectionist, and his approach to work is very strict.

He played a perfect fifth scale on the piano.

He is a perfectionist, so he is very strict about his work.

In behavioral sciences, the use of metatools plays a crucial role.