Undead/lfeless and regeneration and reinvigoration

[Oor-tael]

I still have many unanswered questions about this, even after many years playing this game :

- How can one know if an undead will benefit from regeneration or not ? (except by testing it)

- Does the "undead" tag include the "lifeless" tag ? (as it does for "darkvision")

- What does the invisible "inanimate" tag mean/imply for an undead ?

- Is there is an arbitrary list of "withlife" undead and "lifeless" undead ? "alive" undeads that would benefit from regen and not be considered "lifeless" (ghouls, vampires, etc ?) and really "lifeless" undead that could not regen and be targeted by "Shatter" for example (all kinds of skeletons ?)


Thank you guys for your answers