Yes, actually one <i>should</i> assume that; not doing so is irrational. There are many other diseases that one <i>might</i> have without even knowing they exist. It would be extremely foolhardy to get tested for them if&#x2F;when you become aware of them.<p>&quot;given that most of the research is around prevention of damage&quot;<p>Given that aren&#x27;t any preventative <i>treatments</i>, you&#x27;re barking up the wrong tree.<p>&quot;surely it&#x27;s better to get tested early if you even remotely suspect there is a chance of it being Alzheimer&#x27;s.&quot;<p>No, it&#x27;s surely not.