The answer you get largely depends on the question you ask. Here's a grave example: Several centuries ago, a curious but deadly plague appeared in a small village in Lithuania. What was curious about this disease was its grip on its victim; as soon as a person contracted it, he would go into a very deep almost deathlike coma. Most individuals would die within twenty-four hours, but occasionally a hardy soul would make it back to the full bloom of health. The problem was that since early eighteenth century medical technology was not very advanced, the unafflicted had quite a difficult time telling whether a victim was d…