To determine whether these variations in seismicity levels are random fluctuations or real physical phenomena, objective testing of unambiguously stated hypotheses is required6 .

• 为确定地震活动性中的这些变化是否是随机偶然的波动，还是真实的物理学现象，对不含糊指明的假说有必要进行有目标的试验90。”