The concept of ghost does not necessarily require it to be supernatural. So it is not necessarily self contradictory to believe in ghost while dismissing the supernatural.
In fact, the idiotic theists who claim the supposed departure of soul from the body at moment of death can de registered scientifically by a reduction in body weight is in fact making the claim that the soul is not supernatural, but infact obey natural laws in specifically quantifiable manner.
In fact, the idiotic theists who claim the supposed departure of soul from the body at moment of death can de registered scientifically by a reduction in body weight is in fact making the claim that the soul is not supernatural, but infact obey natural laws in specifically quantifiable manner.