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The method scores poorly for Peacefulness (P=2), but high on Reliability (R=10).
Considering the minor criteria: Availability & Speed score well at 5/5, Preparation & Storage at 4/5. However on Safety and Detectability, only the lowest score would be appropriate, giving a total score of only 30 (60%). The method therefore scores only slightly better than hanging (28, 56%), and less than the inhalation of carbon monoxide (31, 62%) (Chapter 4).