Newton's equations handled falling apples and orbiting moons.
Then Einstein's 1915 theory showed where that picture strained.
William of Ockham, the 14th-century friar behind the razor, argued that explanations should not multiply causes without need. It is a selection rule, not a truth machine, which means the simplest story earns the first look, nothing more.
A simple explanation can still miss a hidden fact. The razor trims the queue; evidence picks the winner.