It was actually a proof of concept they tested multiple times.

To show or demonstrate something is a more flexible concept; proof suggests a certain degree of intellectual rigor.

The concept of supporting a theoretically sound concept by empirical proof.

Proof of Concept it’s probably the best approach to verify an initial idea and its viability for practical implementation. Proof of concept is a demonstration of the practical feasibility of an idea to prove that the method, idea, or technology works.

The purpose of PoC is to:

validate a concept that is supposed to be developed

explore different solutions that could essentially bring the idea into life

concept & mathematical proof of the earth itself and the chemistry of water