Lol. Looking at trees and not seeing the forest. As Dr M stated they do not know the exact MOA for A2-73. Then how but splitting hair over, not even content but language, one gets to the bottom of it? Logic is a tool but it is not the key to physical reality. Paradigms change due to physical evidence not because long logical arguments. The fact that the precise reason for efficacy of A2-73 is still not known strengthens the case for AVXL as the competition is still in the dark. Do not underestimate the power serendipity!