我们当然可以将单个地震的可靠预报定义得很窄，以致于不可能取得成功。例如Ｍａｉｎ所定义的４级预报就要求有这样的高精度和准确度，即根据这种预报可以在震前进行有计划的疏散。然而，迄今为止在这场关于地震预报问题的讨论中，还没有一位参与者认为这种严格而准确的地... Of course, we can define the reliable prediction of a single earthquake so narrow that it is impossible to achieve success. For example, a Level 4 forecast as defined by Main requires such precision and accuracy that planned evacuation can take place before a quake. However, so far no one participant has considered this rigorous and accurate in this discussion of earthquake prediction issues ...