The Most Useless Machine (MUM): A Unitary Hydrodynamic Field Theory

This work presents the Most Useless Machine (MUM), a minimalistic cosmological model in which the universe is treated as a single continuous fluid driven by intrinsic rotation. Within this framework, structures commonly interpreted as matter, geometry, and gravitational behaviour emerge from topological dynamics of the fluid rather than from fundamental particles or fields. The paper outlines the conceptual foundations of the model and provides a first formal formulation using contact geometry and hydrodynamic principles. The aim is not to propose a finished theory but to present a coherent framework and invite discussion, critique, and further development.