Kleiber allometry: an honest open problem

Kleiber's law -- metabolic rate scaling as mass to the 3/4 power -- is reported here as OPEN. The R19 substrate sets setpoint dynamics, not the transport-network geometry that the 3/4 exponent is usually argued from. Rather than fit a number to look complete, this chapter states the obstacle plainly.

RT5. The CHARTER bar is 'reproduced [V] OR honestly flagged [O]'. The exponent needs an external supply-network argument (fractal distribution geometry) absent from the substrate, so it is graded [O] with a stated obstacle -- not faked.

Why it is open

the 3/4 exponent is a transport-network / allometric result (fractal nutrient supply, or surface-to-volume scaling); the R19 dwell primitive sets RELATIVE organ size (dwell ~ gamma^1.5) but does not encode whole-body 3/4 metabolic scaling. The substrate is agnostic to the exponent -- it is not faked here.

Why we do not fake it

A tuned exponent would violate the no-tuning discipline and the honesty grading. The substrate carries no body-size axis and no distribution network; the 3/4 law is a real result of a DIFFERENT model layer. Marking it [O] keeps the gate honest -- an open problem named, not hidden.