Jane Goldman describes several types of "ghost" phenomena in her books. Ghosts are commonly thought to be the souls of the dead, but new theories have emerged about the nature and meaning of these experiences in recent decades. The following is a list of different ghost types and possible explanations of them.
Crisis Apparitions- Usually the appearance of a loved one that roughly coincides with the moment of their death. It is difficult to study these ghosts since their appearance is so time-specific. It cannot be said for sure that these ghosts are not simply figments of the human mind or some obscure working of the human psyche.
Recording Ghosts- These ghosts usually appear in about the same area every time they are seen. This makes them much easier to study than the previous kind. This category includes historical ghosts, such as the appearance of President Lincoln seen at the White House. It is unclear whether these "recordings" in time are caused by some natural characteristic of the environment, or whether it is caused by the human mind itself. Assuming they are not figments of imagination, recording ghosts may be imprinted by the person who "becomes" the ghost, or by a person witnessing the events firsthand, or be activated by a person in that spot who can access these images from the environment.
Time-slips- A time-slip occurs when someone experiences not only a figure, but also an environment from the past. These experiences are hard to study, and do not bare on the life after death question. A time-slip may simply be a glimpse into another time or dimension, or a figment of the imagination. Some time-slips don't even involve "ghosts," just rooms or buildings, leaving a "soul-less" impression in the area.
Interactive Ghosts- These are the rarest experiences. Interactive ghosts often speak one-on-one in an intelligent and coherent manner. They often appear to bring information and/or guidance to the living. They are also reported to become obsessed with preventing experiences similar to the ones that caused their deaths. These ghosts are also very hard to study. Interactive ghosts are the most suggestive that the human soul can survive death in some way.
Cosmology- The philosophy of the universe. This branch is also open to scientific analysis
Epistemology- The philosophy of knowledge; what we can know and how, and what knowledge ultimately is. This is the main branch of philosophy
Ethics- The philosophy of morality. Asks questions about right and wrong, good and bad, duty, etc...
Metaphysics- The study of the ultimate nature of what exists. It questions the universe from "outside" and therefore science cannot answer these questions.
Ontology- The study of what truly exists, as opposed to what we know about what exists.
Plitvice Lakes National Park, Croatia
A breathtakingly beautiful landscape of lakes, waterfalls, caverns, and forest inhabited by unique and fascinating flora and fauna