Introduction

The notion that time is the fourth dimension of space has long dominated scientific thought—but this interpretation is fundamentally flawed. Time is not a spatial dimension; it is a continuous, irreversible flow that cannot be traversed or measured like length, width, or height. It exists independently of space and behaves in ways that set it apart entirely.

Instead, the true fourth dimension of space is reality.

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Reality is not just what we observe—it's the total state of existence we inhabit and interact with. It gives structure and context to the three spatial dimensions and enables them to manifest in form and function. Unlike time, which simply flows, reality is the framework in which events occur and objects exist.

This idea finds strong resonance in the theory of the multiverse, which posits the existence of multiple, co-existing realities. When we account for these distinct realities, it becomes clear that what we call "reality" is itself a dimension—one that can vary and branch, forming a higher-dimensional structure. In this model, the fourth dimension isn't time, but a shifting, expansive field of possible realities.

This perspective redefines how we understand space, existence, and even the fundamental structure of the universe.

Hypothesis

For a long time, the prevailing belief has been that time is the fourth dimension of space. This framework allows us to visualize time as a linear continuum, where the past, present, and future are fixed points we move through—much like coordinates on a line. Under this view, time becomes a dimension we traverse passively, with no control over our movement through it.

However, this idea does not hold up under closer scrutiny. If time were truly a spatial dimension, then movement through it—like time travel—should theoretically preserve the state and structure of objects, just as spatial movement does. But in reality, time travel, as we experience it, alters the state of everything. We age as time progresses. Events become irreversible. Our passage through time is not a traversal through a static dimension—it is a transformation. This is precisely why true time travel is not possible. If it were, and if it ever became possible in the future, we would have already encountered time travelers by now.

Moreover, time itself lacks...

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