Ascribing "true" and "not true" towards things psychiatric/psychological will always have to involve a certain amount of fluidity. Nobody is the exact same way as "the next guy", a person can themselves (sometimes - not always) change to varying degrees over the course of time. Individuals will present across a "spectrum". It's not an area where stasis is the norm.

It's the broader strokes that gather symptoms in a diagnostic net. Not that that's wrong: it helps to have some means to measure. I just think when you're drilling down to an individual level, it's important to bear in mind that what may be true for some, will be untrue for others.