Sadly, that is something that is impossible to prove or disprove.
-- further --
Demons
They have never been proven to exist.
People with certain religious beliefs say they do exist, but they have never seen them, nor experienced them with any other of the five senses.
Other people, more practically-minded say they don't exist but are used figuratively to provide a 'face' for humankind's evil deeds and thoughts.
Ghosts
Science is beginning to show that places which are reputedly haunted are prone to certain physical phenomena - such as very low frequency noises and vibrations. Reproducing these phenomena in places which are not reputedly haunted has caused participants in experiments to report emotions and physical effects similar to those reportd by people who claim to have seen/experienced ghosts/spirits.
No, but there are records of demons
no
No -- ghosts don't exist.
In reality, ghosts and after the grave contacting does not exist. "Ghosts" are really demons that dress up like once living things. So your answer would be our dogs will never contact us after they pass away, unless if you consult demons which I hope you won't do.
Ghosts do not really exist, so how could they? But if they did exist, why would they be frightened of a symbol?
yes
The difference between demons and ghosts is that some ghosts can supposedly be evil but all demons are supposedly evil. Luckily, the thing that ghosts and demons do have in common is that both are not real. Both are made up concepts by humans. There are no ghosts, no angels and no demons.
there is no such things a ghosts, but they are demons sent from the devil.
No one really knows if ghosts actually exist. But if they do they are formed by particles. Particles are attracted by gravity.
Ghosts are not. However, demons are. Ghosts are spirits, and all spirits either go to heaven or hell, so no, but demons, as I said, are real.
There is some debate regarding whether there are ghosts and Goddesses in the world. Some people believe that ghosts and Goddesses exist while some believe that none of these creatures are real. There does not seem to be any scientific proof that ghosts or Goddesses exist.
because we don't actually know if ghosts exist on earth or not if they do they could have died there and is now living there but if they don't well its just people tricking you.