I'd have to disagree with Andukar's statement "it is math nonetheless". Mathematics and physics describe the world, but they aren't actually the world.

Take as an example an equation describing the y-component of projectile motion in two dimensions:

vIf someone were to fire a projectile, its motion will, in fact, be precisely predicted by that equation._{y}= v_{0}sin θ + a_{y}t

^{1}But is the projectile actually

**using**the equation to move? Is the universe itself actually running numbers through equations to determine what it will do next? Clearly not, as this would require an endless stack of places-to-run-the-numbers, which themselves would have to operate on such rules. (cf. Douglas Hofstadter)

##### The equations *describe* the events of the universe; they do not *specify*
the events.

^{1}With the usual caveats about air resistance, relativistic speeds, external forces, etc., which are not relevant to the discussion.