There are many different definitions for immortality.  Psychexistology deals with real scientific immortality or natural immortality. It does not need souls or spirits etc. to allow for the possibility of immortality to exist or to be created. The total grouping name for all the types of scientific immortality is itoimmortality.
The science of psychexistology shows how many different forms of immortality are possible, It gives many proofs or arguments for the different types of immortality. The some of the different types of immortality are covered in the following areas orimmortality, citoimmortality, vitoimmortality, fitoimmortality, isoimmortality, and musimmortality.
Immortality is thus defined as: there will never be a time where you will not have the possibility of experiencing being conscious again. You do not have to be conscious all the time to be immortal in this definition. However, you will seem to be always conscious to yourself, because you cannot experience not being conscious. The science of psychexistology does not guarantee immortality for everyone but it appear scientifically to be very likely. And as the science advances and the experiments become more advanced we will have a better understanding of immortality in general and for each person specifically. Because a version of your physipath always has the potential of being created in the future so can one or many versions of consciousnesses that you will experience; awarepaths with your ixperiencitness.
There are positive aspects of not being sure if you will ever experience consciousness again. One is that you will give this life, the one that you are living now more respect. People that do not believe in life after death generally believe that you need to make the most of this life.
Life can be very difficult and painful. Many times it seems that it would be easier not to exist any longer. If most people killed themselves when times got tough the human race would be much different than it is, maybe even non existent.
Religions have proposed supernatural immortality based on the concept of an immortality producing god. They have connected this immortality to the concept of a wonderful after life or heaven. If you are a true believer in these religious ideas, where you have the choice between a wondrously lovely heaven(with your loved ones),and a difficult and painful life on earth, it would be a rational choice to kill your self in order to go to heaven. Consequently these religions have had to threaten people with eternal hell and the consequence of endless suffering so that they would not kill themselves.
Scientific or Natural immortality does not have this problem. The quality of your immortality is based upon your endeavors to make heaven on earth so to speak. It never gets boring because there is always a challenge to survive and to make things better.
Scientific immortality besides being true, is much better than religious or supernatural immortality because there is so much more variety, challenge, creativity, freedom, individuality, individual control, new experiences, even historical conscious repetition.
There are also other concepts that apply to immortality. these are types of immortality
1. Continuous ixperiencit existence from the perspective of an accurate external observers.
2. Intermittent ixperiencit existence from the perspective of an accurate external observers.
3. Always having the potential for ixperiencit existence in the future from the perspective of an accurate external observers.
4. Multiple continuous ixperiencit existence from the perspective of an accurate external observers.
5. Multiple intermittent ixperiencit existence from the perspective of an accurate external observers.
6. Always having the potential for multiple ixperiencit existence in the future from the perspective of an accurate external observers.
The consciousness itself can believe many aspects of immortality that do not exist in reality. This is why an accurate external observer is necessary for the definitions of immortality. For example a consciousness can contain the belief and experiences where it believes that it is immortal because it remembers being many different people in past lives when in fact these past lives never did exist.
The different forms of Immortality can exist and not apply to all originals. But it is unlikely that there can be many cases where there is not at least the potential for ixperiencit existence in the future considering the fact that there might be an infinite amount of universes that might exist forever that have the ability to create consciousnesses.
None existence of an original or any version of this original ever. An original that never exists is not going to care or cannot care if he is not immortal.