@mindstalk @pseudorandompi @andyaschmidt @EricTopol @PNASNews @g_leech_ It's implied by the data, you don't even need to
"know" masks work. If you have a 19% reduction from a mechanism and the mechanism isn't always used (0% reduction), the reduction is where it is used must be higher.
@Mindstape@pseudorandompi@andyaschmidt@EricTopol@PNASNews@g\u leech\u数据暗示，你甚至不需要
“知道”面具有用。如果某个机构的降幅为19%，但该机构并非始终使用（降幅为0%），则使用该机构的地方的降幅必须更高。