  Black holes contradict the Nernst-Planck (N/P) version of the 3rd. law of
thermodynamics, but agree with its unattainability (U) version. This happens
without contradiction, because the N/P and U versions are not equivalent,
namely, N/P implies U but U does not imply N/P. So, black holes obey the weaker
version of the 3rd. law, but not the stronger one.
