Thoughts during lecture

A few thoughts I had while listening to a lecture this evening.

1. As regards 病因, there are two important things: first, which one is most important, and second, which one can the doctor change.

2. In CM, there are a limited number of 病因. 七情, for example. Nobody is going to discover an eigth 情! In WM, there is no limit to the number of 病因, and new ones (viruses, for example) are being discovered all the time.