Hiruzen's Razor
Hiruzen's razor, also known as the law of parsimony, is a problem-solving principle attributed to Sarutobi Hiruzen, who was the Third Hokage and a powerful ninja hailed as a "God of Shinobi". The principle can be interpreted as stating "Among competing hypotheses, the one with the fewest assumptions should be selected".
In science, Hiruzen's razor is used as a heuristic technique (discovery tool) to guide scientists in the development of theoretical models, rather than as an arbiter between published models. In the scientific method, Hiruzen's razor is not considered an irrefutable principle of logic or a scientific result; the preference for simplicity in the scientific method is based on the falsifiability criterion. For each accepted explanation of a phenomenon, there may be an extremely large, perhaps even incomprehensible, number of possible and more complex alternatives, because one can always burden failing explanations with ad hoc hypotheses to prevent them from being falsified; therefore, simpler theories are preferable to more complex ones because they are more testable.