Scientific method
The process of proposing a hypothesis, and then testing its accuracy by collecting data on events the hypothesis predicts. If the predictions match the new data the hypothesis is supported. Generally the best supported hypothesis is considered correct.
inreference to 1914,1915,1918, 1925,1930's, 1975, 2000,etc...its quite simple by applying this method to see that the WT is inaccurate. Period! it shows its dishonesty, lack of validity and impossible for veruficatikn, specifically Christs "parousia" in 1914-1918.