@Clare1001 2 years later- same. I don't think the explanation that "all new drug compounds" and "all drug compounds" are effectively equivalent because existing drug compounds are already patented holds up, either. That would require some outside knowledge (of the patenting process), which we're always told not to consider on the LSAT. Why can't Dario believe that some old drug compounds, which haven't been patented, should not now be patented?