21. The results " guarantee the irreversibility of the peaceful political formation of the republic," 22. Hormone treatment or surgery for gender dysphoria is somewhat controversial because of the irreversibility of physical changes. 23. A classic example of irreversibility is allowing a certain volume of gas to be released into a vacuum. 24. This inequality is a statement concerning the irreversibility of natural processes, especially when energy dissipation is involved. 25. This however relies on American policy makers grasping the meaning and irreversibility of the Minotaur's demise. 26. For his part, Arafat said the accord " demonstrates the irreversibility of the peace process ." 27. What is the point of making punishment harsher if the law enforcement system cannot secure the irreversibility of punishment? 28. Irreversibility is a concept developed in this stage which is closely related to the ideas of centration and conservation.29. Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. 30. Thus entropy production is a measure of the irreversibility and may be used to compare engineering processes and machines.