The increased concentration of the Sobriety Potion leading to mental confusion after consumption was a very complicated problem in itself. It involved almost astronomical changes and conflicts. Other than a pharmacist of the Divine Smith level, there was probably no one else who could grasp each and every change in the potion.
The old and the young in the seats were considered top figures in pharmaceutics—one was a master and the other a guru. But they had talked for a long time and yet still failed to figure out any solution. Instead, Old Grimm learnt a lot from the discussion. What he had never heard nor thought about before came up in his head all at once, and all kinds of unheard of novel theories had been an eye-opener for Old Grimm.
As for Rowling, who was listening at the side, it all sounded Greek to her.