Statistics. It all boiled down to percentages. There weren’t just sixteen people in this world. There weren’t even just a hundred. There were many more. How many people had working iPhones at the time of the call? How many had their iPhones when they arrived? What percentage of people have iPhones to begin with? And of that number, how many people died or weren’t able to answer the call? How many ignored it out of fear or caution? How many people were in this world?