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Halvedon A Few Bad Scientists Are Threatening to Topple Taxonomy

He hasn't published for a few years as evidenced by this list:

https://species.m.wikimedia.org/wiki/Raymond_Terrence_Hoser

Halvedon Blood test identifies Alzheimer's with 86% accuracy and differentiates forms

I never know how to interpret accuracy ratings for tests. If I told everyone I ran into on the street that they did not have Lou Gehrig's disease, regardless of any testing, I would still be 99.993% accurate. Can someone shed some insight on what 86% means?

Halvedon A Solution of the P versus NP Problem?

But then how will we know that paper is correct?