She suggests that "people trust the old names because the material in them has been passed along in secret from previous generations, so they are less likely to be wrong than ones produced by somebody who has just taken an evening course in almanac calculating."
而林先知、蔡炳圳都是二十年左右。「大家相信老字號，因為這些通書編纂資料是父祖密傳下來的，當然比一般人上補習班學來的不易弄錯。」