What is the “rule of law”

the restriction of the arbitrary exercise of power by subordinating it to well-defined and established laws.

Explanation:

The rule of law is the political philosophy that all citizens and institutions within a country, state, or community are accountable to the same laws. The rule of law is defined in the Encyclopedia Britannica as "the mechanism, process, institution, practice, or norm that supports the equality of all citizens before the law, secures a nonarbitrary form of government, and more generally prevents the arbitrary use of power." The term rule of law is closely related to constitutionalism as well as Rechtsstaat and refers to a political situation, not to any specific legal rule.

A process that uses observation and experimentation to gain knowledge is called science.