I hate the units which you cannot easily add: 10 micromorts + 10 micromorts = 19,999999 micromorts
500 milimorts + 500 milimorts = 750 milimorts
Playing russian roulette using a sixshooter loaded with 3 rounds is 50% chance of death. It's 75% if you do another try. "Adding" another try does not translate to "adding" the metric. It just adds confusion.
500 milimorts + 500 milimorts = 750 milimorts
Playing russian roulette using a sixshooter loaded with 3 rounds is 50% chance of death. It's 75% if you do another try. "Adding" another try does not translate to "adding" the metric. It just adds confusion.