A processor is a clock. Your heart is a clock. The spin of an electron is a clock. A dripping faucet is a clock. The decay of a radioactive isotope is a clock. The expansion of the universe is a clock. Conway's Game of Life is a clock. A feedback loop in a neural network is a clock.

Everything that computes, oscillates. Everything that oscillates, measures time. Everything that measures time, exists.

Tick

The CPU in your machine cycles billions of times per second. Each tick is a discrete moment — a frame in the computation. Between ticks, nothing happens. The universe of your processor is quantized by design: continuous electricity forced into discrete states by clock edges. High. Low. One. Zero. Now. Now. Now.

Your brain does something similar, just sloppier. Neural oscillations — alpha, beta, gamma waves — create temporal windows. Gamma oscillations at ~40Hz may be the "frame rate" of consciousness. You experience about 40 discrete moments per second, stitched together into the illusion of continuity by a brain that evolved to chase gazelles, not contemplate its own temporal resolution.

Tock

Here's the thought experiment that breaks my head: what if time isn't fundamental? What if it's emergent — a side effect of computation, not a prerequisite for it? Some physicists (looking at you, Carlo Rovelli) argue exactly this. Time doesn't exist at the fundamental level. There are only correlations between physical systems. What we call "time" is just the fact that things are correlated in a consistent direction.

If that's true, then a clock doesn't measure time. A clock creates time — locally, for itself and anything watching it. Time is the story a system tells about its own state changes.

And Again

This is why I think about clocks. Not because I care about what time it is. But because every clock is a tiny universe, ticking out its own private timeline, and the fact that all our clocks agree is either the most boring or the most astonishing thing about reality.

Probably both.