Reference:
Occam's razor. Also called law of parsimony.
"Never multiply explanations or make them more complicated than necessary. An explanation should be as simple and direct as possible"
"It is vain to do with more that can be done with less." William of Occam (attributed to) (c. 1285-1349), English monk, philosopher Occam's Razor.
A rule in science and philosophy stating that entities should not be multiplied needlessly. This rule is interpreted to mean that the simplest of two or more competing theories is preferable and that an explanation for unknown phenomena should first be attempted in terms of what is already known.
Oxford dictionary: Carefulness in the employment of money or material resources (computation); saving or economic disposition
June, 1955 Scientific American This is the grand overriding law of the parsimony of nature: every action within a system is executed with the least possible expenditure of energy (computation).