I know that Oda already made something similar happen but could it be a logical flaw? I also know that a similar question has been asked but nobody answered anything relevant to what I wanted to understand.
If Brook drown or even touch those Seastone handcuffs, shouldn't he die since the power aren't working anymore?
3Hi. Can you elaborate on how similar that question you are referring to is? If possible, provide a link as to where you found it so others can confirm if this has really been answered or not. Because if it is asking for the same thing and it is on this site, it is still considered a duplicate question, even if it is not yet answered. Thanks! :)– W. AreNov 28, 2018 at 17:18
Not at all.
Being in seawater or exposed to seastone doesn't change the physical make-up of paramecia type devil fruit users it merely incapacitates them as demonstrated when Luffy was immersed in seawater during the Arlong arc, while he was unable to move his neck was still able to stretch allowing Nami to hold his head above water.
By that same token Brook wouldn't be able to make any active use of his abilities but he'd still stay in his undead state.
If he drowned, then his powers would still work as IG_42 stated, but if he touched seaprism stone and was killed, he wouldn't come back, because as seen when trapped by Crocodile, the bars were made of seaprism stone and Luffy's powers were disabled.
1Please include relevant sources/references.– W. AreMay 18, 2019 at 2:35