Liang Nai-tsung notes that when scientists examine different natural phenomena, the most important principles for them are generality and repeatability. If scientist A produces certain results from an experiment, scientist B should be able to obtain the same results. What you produce once, you should be able to duplicate at another time and place.
梁乃崇指出，科學家要處理的是物質世界的各種現象，最重要的原則是「普遍性」和「重複性」，也就是某甲可以做出的實驗結果，某乙應該也可以；這次做可以，換個時間地點再做，結果應該不變。