I’d have to do some more research myself. It sounds like you have a more sophisticated understanding than I do.

Regardless, potential Alzheimer’s treatments have mostly been a cascade of failures, so I can see the optimism here. Even finding a drug that correlates with slower ameloid buildup is good news, because (to further your analogy) it might give detectives more evidence regarding the actual crime. For example, now researchers might be able to tease out variables in order to narrow down a causation, which could make it easier to identify more (and possibly more important) correlations. It’s just a small step, but the first in a long time that feels like the correct direction.