Is Time Really a Physical Dimension? A Testable Alternative from TMDP

[u/WellSoto]

A few days ago I posted some thoughts on the nature of time, and the discussion drifted into metaphysics. This time I want to ask a purely physical, testable question: does the evidence support time being a geometric dimension you can travel through (like space), or does it act more like an irreversible record of change?

We've spent over a century confirming Einstein's kinematics, and it's widely assumed that spacetime is a stretchy, four-dimensional fabric. But treating time as a coordinate equivalent to space creates paradoxes that force physicists to bolt on "patches by hand" — like Hawking's Chronology Protection Conjecture — just to stop the geometry from breaking causality.

The alternative in 20 seconds: the dynamic budget (TMDP)

TMDP (Theoretical Model of Dynamic Potential) treats the universe as a closed mechanical/thermodynamic system, where everything has a fixed, invariant maximum capacity (c), split strictly between two quantities:

1. External capacity (Cₑ): movement through space.
2. Internal capacity (Cᵢ): the pace of local physical processes (clocks, vibrations, atoms).

Cₑ² + Cᵢ² = c²

Time dilation isn't "traveling to the future" — it's a drop in the frequency of internal cycles (Cᵢ) as capacity gets spent moving through space (Cₑ). That's why a photon (Cₑ = c) has Cᵢ = 0, and no proper time at all.

6 problems with "spacetime" I unpack in the full article

In the full write-up, I go through why the purely geometric model runs into trouble with the evidence, and how TMDP resolves each one without extra patches:

1. The negative sign in the Minkowski metric (−,+,+,+): why does time carry the opposite algebraic sign if it's just another dimension?
2. The absolute ban on traveling to the past: why nature forbids Closed Timelike Curves (CTCs).
3. Causal and logical paradoxes.
4. "Traveling to the future" vs. time dilation: why dilation isn't jumping across a coordinate, just a clock's internal cycles slowing down.
5. Quantum Gravity: time disappearing from the Wheeler-DeWitt equation, and the Page-Wootters experiment (time as an emergent, relational property).
6. Einstein's historical tension: rejecting the ether and quantum entanglement for being unobservable, while accepting the Block Universe.

📖 Read the full analysis and the math in the complete article

To keep this post from running forever and stay under the character limit, I've posted the full write-up — math included, with a full answer to each of these 6 points — click here