Let me reiterate that I’m generalizing wildly here.

And I’m basing this on what research I’ve been able to dig up identifying specifically what we’re all looking for — which isn’t nearly as voluminous as the research confirming that we seem to be looking at different things. If I’ve got any of this wrong, or if you have your own observations or sources, feel free to let me know in the comments!

Also, it’s not that we don’t share any of the same diagnostic features with each other — it’s just that we don’t share all of them. Which will become important for another reason on the next page.