"Control...variables?"
The assembled scholars, all elites educated at the Academic Palace, furrowed their brows thoughtfully and quickly grasped the gist of what Li Ang meant.
"Is it mosquitoes, not evil miasmas, that cause malaria?"
Song Shaoyuan and Zhai Yiming's eyes widened as they murmured to themselves.
Ji Linglang appeared pensive.
Yang Yu curiously looked at Li Ang. Regardless of whether he was right or not, the theory that mosquitoes caused malaria was novel, distinct from the conventional ideas of evil miasmas, Malaria Demons, or [illness being a consequence of] disloyalty and unfilial conduct.
The servant standing at the doorway maintained a respectful and restrained posture, showing no sign of movement. His ear merely twitched, as if he had heard a command from the next room, and he respectfully cupped his hands to ask, "So, young master, do you have any evidence?"