21. The central idea here is that of reversibility . 22. The name " exchange spring magnet " is derived from the reversibility of magnetization. 23. Reversibility felt like an austerely beautiful thing,24. In addition to reversibility , MAOIs differ by their selectivity of the MAO enzyme subtype. 25. Many chemical changes are reversible, but reversibility is not a certain criterion for classification. 26. Reversibility is demonstrated by using the complementary keto / amino acid pair as starting reactants.27. Boltzmann's condition holds for all Markov processes, irrespective of time-reversibility . 28. Do the kinetics data reported for this article agree with the law of microscopic reversibility ? 29. Otherwise, an important notion called " micro-reversibility " would be violated: 30. That is where reversibility comes in.