The question presupposes that ghosts exist. You have to get over that hurdle before you can contemplate answering the question in the title. But let’s for the sake of argument agree that ghosts do exist. Could domestic cats see them when we can’t?
There is nothing in the anatomy of a domestic cat compared to ours which informs me that the domestic cat is more able to see ghosts than humans. Therefore, if ghosts can be seen by cats they can also be seen by people. I do not believe that the domestic cat has an advantage over humans in this regard.
To return briefly to the question as to whether ghosts exist or not. To the best of my knowledge, as at the date of this post, there is no scientific evidence which supports the existence of ghosts. That is not to say that they don’t exist. A lot of people claim that they have seen ghosts. This is anecdotal evidence and you can believe it or not. It is up to you.
There’s nothing more to say in all honesty. This is because the question is badly formulated. It also presupposes that cats have some sort of special anatomical ability to see things that humans can’t see. This is not true. Domestic cats can see better than us in the dark. This is a well-known fact. Although they are partially colorblind. But both these facts have no bearing on whether domestic cats can see ghosts or not unless you argue that because ghosts are very faint and dark the cat is more likely to see them. I don’t buy that argument. Ghosts are not so faint that humans can’t see them (if they exist).
If you believe in ghosts it seems that they are sometimes invisible but that they make noises or move furniture around. Once, again, in my opinion, there is no difference between cats and humans in respect of their ability to pick up these signals.
There is one other aspect to this question. It does not concern seeing things. It concerns the domestic cats alleged ability to pick up signals and signs that humans are incapable of tuning in to. An example is that domestic cats can predict when an earthquake is about the strike. There’s nothing concrete which supports this skill but if it does exist I don’t think it supports the idea that cats can see ghosts and we can’t.
I’m sure that to many people I am being too scientific and not intuitive enough. I’m convinced that there will be many people who believe that domestic cats can see ghosts because of their intuitive abilities. I welcome alternative views. There is no science on this so it is down to points of view and perhaps some anecdotal evidence.
There are some quite amusing webpages on this subject. The fact that they are amusing supports the idea that cats can’t see ghosts. Cats do sometimes look at things intently that we can’t see but that does not mean that your cat is looking at a ghost. It means that he or she can see something that we can’t and it is quite likely to be an insect.