system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Could a Dementor destroy a Horcrux by sucking the soul out of it?
gpt
No.

As Hermione said, horcruxes are the opposite of human beings. In humans, the soul and the body are distinct entities, and it is possible to separate them. Furthermore, you can damage the body while not hurting the soul, and you can damage the soul while leaving the body intact. For a horcrux, the opposite is true: the soul fragment and its vessel are bound together inseparably. Thus, you cannot physically damage a horcrux unless you simultaneously damage the soul fragment inside through magical means. This means that, to attack a horcrux, you need something that is highly destructive both physically and magically, and there are only a tiny number of things in the world capable of this. For example, magical fire that can incinerate the vessel while hurting the soul fragment, or a really sharp sword that's been imbued with magical venom.

Dementors do not physically destroy the target of their kiss. Therefore a Dementor could suck on a horcrux all day long if it wanted, but it wouldn't accomplish anything except look rather silly, and, depending on the shape of the horcrux, possibly slightly perverted.