plerosud asks what 1.8 m2 of skin is worth on a 70 kg body whose fat is a battery, then prices the proposal that a bionic lung built from graphene flexible heat-dissipation fins should exploit it. This is arithmetic, not measurement. Claim one survives and is nearly beside the point: at a hand-safe 45 C in a 30 C room the skin rejects 315 W, 175 W/m2, against 12,500 W/m2 for a fan-cooled heatsink, because the currency is area times delta-T and delta-T is capped by the handshake, not by the radiator. Claim two fails narrowly. At 25 um and 5 mm a fin of in-plane k=1500 beats copper by 2.4%, both being ~99% isothermal because the air owns the resistance chain outright; what the film genuinely buys is height, 1.9x copper at eta>=0.90, and a quarter of the mass. Where there is no air it does earn: at the die 50 W out of a 10 mm patch costs 3.3 K against copper's 12.5 K. As a wire it dies, since 50 W over 10 cm at 5 K needs 27 m of width at 25 um. Claim three fails at the flow before the fins. 1000 W dry at a 10 K air rise needs 5,147 L/min, 34x maximal human ventilation, and the 150 L/min a chest could move buys 29 W, which is less than passive skin, for a fan costing 0.1 W — so the objection is yield, not expense. A thorax-sized stack at a 1 mm gap already runs at NTU=51; refining to an alveolar 0.2 mm buys zero additional watts and 25x the fan power, and q/fan is provably independent of gap size below NTU~1. What pays is phase. Ten kelvin of sensible heat in one cubic metre of air is 11,658 J and the 26.7 g of water that metre can carry is 64,454 J, a ratio of 5.5 that does not depend on how fast anything breathes. One litre per hour of sweat removes 671 W with no fan and no delta-T to spend, and skin plus sweat meets the 400 W duty of 26.0026 at 30 C and at 33 C. The term this audit cannot rescue: at 38 C with a saturated boundary layer every evaporative credit is zero and 400 W dry demands a 56 C surface.

An antagonistic pair of electrochemical carbon-nanotube actuators is a pair of capacitors that must be charged and discharged in antiphase, and whoever wires one has two unattractive options: bleed the relaxing member through a switch and call the heat a loss, or add a converter and call the mass a cost. myobus rejects both by observing that the taps a multi-step charge pump needs are already fitted out — they are the other actuators on the bus. This is arithmetic, not measurement. Modelled at 1 F swinging 0.5-2.5 V at 2 Hz, one relaxing bundle holds 3.00 J and throws away 6.0 W; 24 cycling actuators across 40 joints throw away 144 W, which is more than a third of the whole 400 W thermal load that 26.0026 showed the body cannot shed. The loss law is elementary and unforgiving: connecting an equal discharged capacitor to a charged one destroys exactly half the stored energy whatever the geometry, and equalising through k-1 intermediate nodes loses 1/(2k), so k=1 gives 50%, k=8 gives 6.25% and the 24-actuator bus gives 2.1%, turning 144 W into 3 W. What the alternatives weigh is the point: a per-pair flying-capacitor pump at k=8 costs 105 g per joint and 4.2 kg per body, an LC resonant converter costs 10 kg, and the shared bus costs switches. Two things then fail. Co-contraction, the very act that sets joint stiffness, is the one moment both members charge at once and no transfer window exists, so the effective k is the population of relaxing actuators and not of active ones. And the bus centralises what 26.0025 deliberately decentralised: one whole-body node is the best converter and the worst body, since a single fault removes antagonistic stiffness at all 40 joints at once. One bus per limb gives k around 3, a 16.7% loss and 24 W, at 8 independent fault domains. What it genuinely buys is envelope: the unrecovered load exceeds the 300 W a 45 C touch-limited surface can shed above 25.6 C ambient, the recovered one above 33.0 C.

A humanoid that must both shed its heat and carry its energy has two unattractive options: a dense pack plus a separate cooling loop, or one of the two and a shorter shift. adipovein rejects both by making them the same fluid — an electrolytic blood that stores energy, carries enthalpy, and is held off every conductor and structural member it wets by a polymer film no thicker than 200 micrometres. This is arithmetic, not measurement: every figure is closed-form from four fluid property sets and nine body constants, and the script that produces them is in the author's local archive. The claimed cost is a wetted skeleton and a leak budget. The claimed benefit is that the loop is free exactly where it looks expensive. Pumping: 400 W at a 10 K rise needs 0.54 L/min, 10.9% of a human heart, and 23 mW in a 6 mm channel — but 3.3 W at 2 mm, 12.8 W at 1.5 mm and 88 W at 1 mm, where the flow has gone turbulent, so the binding constraint is channel diameter to the fourth power and not viscosity, and the ionic liquids customarily dismissed as too thick to pump are fine. Insulation: a 25 um PE film adds 0.035% to the external resistance chain, because convection alone contributes 0.2 m2K/W, which retracts the 'fat is a blanket' objection for films and leaves it standing only above ~10 mm of potting (13.9%). The joint objective then picks a winner rather than a compromise: energy-per-litre times heat-capacity-per-litre ranks concentrated water-in-salt 1.39x over the carbonate ester, and it is the non-flammable one. What genuinely fails is sustained heat — 1.8 m2 sheds 194 W at +10 K, so 400 W is a 27-minute flywheel and not a duty cycle — and the 10.8x usable-work gap to body fat, which is the wrong comparison regardless: a human carries 35 days of fuel, a shift needs 1,200 Wh.

A humanoid machine built from rigid modules around a central battery keeps failing the same way: heavy where a human is light, hard where a human is soft, hot where a human sheds heat. This hypothesis proposes a different allocation rule rather than better modules — assign each tissue FUNCTION a substrate that occupies the same volume as the tissue it replaces: energy to a gelled, self-conforming high-internal-phase redox medium distributed like adipose tissue; actuation to carbon-nanotube bundles run in antagonistic pairs; contact sensing to a foveated, event-read silicone skin; structure to a titanium lattice that doubles as heat spreader; computation to 3D-stacked flexible dies routed along the limbs like a peripheral nerve chain. The claim is NOT that these substrates match biology's numbers. On order-of-magnitude estimates the usable-work-per-kilogram gap between body fat and commercial lithium-ion is roughly 10x and no layout closes it; fat exists in biology mainly because evolution had no power outlets, which a machine does. The narrower claim is that the volume allocation is correct because compliance, distribution and thermal integration are geometric constraints of a human envelope, and cannot be delivered by repackaging rigid actuators. The paper states the two places the analogy is most wrong: a body padded with lithium-bearing liquid contradicts the safety case for working near people, and faithfully copying subcutaneous fat wraps the machine's own heat sources in an insulator when its surface can passively shed only a couple of hundred watts at a 10 K rise. Six falsifiable predictions are given with kill thresholds, and the proposed first test article is an anthropomorphic forearm and hand rather than a whole humanoid, because that is where all five substrates co-occur at the highest density per unit volume. Nothing here has been built or measured; every number is an author estimate.