…suspicion gradually grew that possibly the deep law of the reflection symmetry in nature may be false. And so Li and Yang suggested that other experiments be done in related phenomena, related decays, to try to demonstrate that the law, whether the test,…

…scared to ask for myself. But that was the first time that it was publicly suggested in a serious way. And then Li and Yang took it even more seriously and proposed various experiments to try, two among others, which were tried by one by Wu that I…

…won't go into detail. We got into tighter and tighter difficulties, more and more paradoxical situation until somebody proposed, Li and Yang proposed, maybe the principle that right and left symmetry, that nature is the same for right and left, is not…

…is the same for right and left, is not right. And that would help to explain a number of mysteries. And Li and Yang proposed some more direct experiments to demonstrate this. And I'll just mention the most direct of all the experiments, the easiest way…