The argument was given at least three times throughout the thread. Other posts emphasized different points made in the argument. Yes, I do repeat myself a lot. My argument isn't "These testimonies seem to be real, so they must be real." This indicates that you've only read a few posts. Here's the inductive argument one more time.
This is an updated version of the argument with some editing and added statements for clarity. This was copied from my posts in Quora.
This is the argument I put forth in my thread Evidence of Consciousness Surviving the Body, in The Philosophy Forum under the name Sam26. I have also talked about this argument in other philosophy forums. I say this to allay questions of plagiarism. I have been posting on this subject for at least 12-15 years across many platforms.
My claim is that there is sufficient testimonial evidence to reasonably conclude that consciousness survives (that we survive, albeit in another form) the death of the body. So, I am making the claim that I know the conclusion of my argument is true. And, although I believe I could make other claims (and I will in later posts) based on the evidence, that is, claims of knowledge (by knowledge I mean justified true belief), I am limiting the scope of the conclusion in this initial post to keep confusion to a minimum. By limited, I mean I am not trying to give evidence of a God, heaven, that we are eternal beings, or any other spiritual or religious idea or doctrine; nor am I trying to give evidence of many of the other claims people are making while having such an experience. Although, as I have said, I do believe there is strong evidence to support other conclusions, and these conclusions have varying degrees of certainty, just as many of our everyday conclusions have varying degrees of certainty (subjective as well as objective certainty).
Preliminaries:
The first question is, what makes a strong inductive argument? The criteria for a good inductive argument are much different from the criteria for a good deductive argument. The criteria of a good inductive argument are as follows:
(1) number
(2) variety
(3) scope of the conclusion
(4) truth of the premises
(5) cogency
First, number. It seems rather obvious that if you have a greater number of testimonials that say something happened, then the stronger the argument. This does not mean that the conclusion relies solely on numbers because numbers in themselves are not always sufficient. It is important to the understanding of this argument that all of the criteria work together to strengthen the conclusion.
Second, variety. The greater the variety of cases cited the stronger the conclusion. When examining the conclusion of an inductive argument, the conclusion is either strong or weak, which is much different from a good deductive argument, where the conclusion follows with absolute necessity if it is sound (soundness means the deductive argument is both valid and the premises are true). The difference is what is probably or likely the case (inductive arguments), versus what necessarily follows (deductive arguments). A common misconception among some people is that if we do not know with absolute certainty then we do not know, but this is an error. Most of what we know is based on inductive reasoning, including many of the claims of science. Most of it is probability-based, so it is not known with absolute certainty, it is known with a high degree of certainty. So, when I use the phrase “I know..” in reference to the conclusion of this argument, I am referring to what is known based on what is probably the case; and since probability varies significantly I should say that I believe that the conclusion follows with a very high degree of probability based on the strength of the evidence.
Third, the scope of the conclusion. This has already been covered briefly in the opening paragraph (I'm referring to an opening paragraph in my Quora space.), it means that the less the conclusion claims the stronger the argument. In other words, conclusions that are broad in scope are much harder to defend. A conclusion that is limited in scope is easier to defend. The reason is that conclusions that are too broad require much more evidence than conclusions that are limited in their scope.
Fourth, truth of the premises. This means that the premises must be true, which by the way, is the same criteria that make a good deductive argument, that is, a good deductive argument must be sound (soundness has to do with whether the deductive argument is valid, plus the premises must be true).
(a) Since we are dealing with testimonial evidence, to know if the testimonial evidence is true, we first need corroboration, that is, we need an objective way to verify the testimonial evidence. This helps to establish the truth of the claims or the truth of the premises. Moreover, it helps add an objective way of verifying subjective experiences. There is both a subjective and objective component to this argument. The objective component helps to determine the objective facts of the experiences.
(b) Another important factor in determining the truth of testimonial evidence is firsthand testimony, as opposed to hearsay or secondhand testimony. Firsthand testimony is stronger than hearsay or second-hand testimony, all things being equal. This is an important component of all testimonial evidence and should be carefully considered when examining any kind of testimonial evidence.
(c) Consistency of the reports is another important criterion in terms of getting to the truth. However, testimonial evidence does not have to be perfectly consistent to be credible. When dealing with a large number of reports you will inevitably find some inconsistency. So, inconsistency itself is not enough to rule out the reports unless the inconsistency is widespread, and of such a number, that it affects the quality and number of consistent reports. So, although consistency is important, it must be looked at in terms of the overall picture. We often find inconsistent testimonial reports but that does not mean that all of the reports should be dismissed, it just means that our testimonial evidence should be based on those reports that are consistent.
Fifth is cogency. You rarely hear this criterion, but it is very important in terms of the effectiveness of the argument. There is a sense where any argument's (deductive or inductive) effectiveness is going to be based on whether the person to whom the argument is given, knows the premises are true. For example, if I give the following argument:
The base of a souffle is a roux.
This salmon dish is a souffle.
Hence, the base of this salmon dish is a roux (Dr. Byron I. Bitar, Classical Christian Wisdom, p. 70).
If you do not know what a souffle or a roux is, then you do not know if the premises are true, so how would you know if the conclusion is true? You may know that the argument is valid based on its form, but you would not know if the premises are true. So, you would not know if it is sound. For any argument to be effective, you have to know if the premises are true; and since knowledge varies from person to person, an argument's effectiveness is going to vary from person to person.
Now we have given some of the preliminaries, we will proceed to the argument itself.
The Inductive Argument:
The following argument is based on the testimonial evidence of those who have experienced an NDE, and the conclusion follows with a high degree of certainty. As such, one can claim to know the conclusion is true. This argument makes such a claim.
Each of the aforementioned criteria serves to strengthen the testimonial evidence. All of the criteria in the previous paragraphs work hand-in-hand to strengthen the conclusion, and the criteria serve to strengthen any claim to knowledge. If we have a large enough pool of evidence based on these five criteria, we can say with confidence that we know that consciousness survives the death of the body, namely, we can say what is probably the case, but not what is necessarily the case.
Again, if there is a high degree of probability that these testimonials reflect an objective reality, then we can also say with confidence, that we know consciousness survives the death of the body. Thus, our knowledge is based on objective criteria, not on purely subjective claims.
We will now look at the testimonial evidence in terms of the five stated criteria, and how these testimonials support the conclusion.
First, what is the number of people who claim to have had an NDE? According to a 1992 Gallop poll about 5% of the population has experienced an NDE; and even if this poll is off by a little, we are still talking about millions of people. So, the number of accounts of NDEs is very high, much higher than what we would normally need to add to the strength of the conclusion.
Also, as was mentioned in the previous post, numbers in themselves are not enough, which is why the other criteria must be coupled with numbers.
The second criterion of good testimonial evidence is variety, that is, do we have evidence from a variety of sources? The answer to this question is in the affirmative. NDEs have been reported in every culture from around the world, which by definition means that we are getting reports from different religious views, and different world views. NDEs also span every age group, from young children to the middle-aged and finally to the aged. The testimonial reports come from doctors, nurses, scientists, atheists, and agnostics, literally from every imaginable educational level and background. NDEs occur in a variety of settings, including drowning, electrocution, while awake, while on the operating table, after a heart attack, etc. People have also reported having shared an NDE with someone else, although rarely. They have happened when there is no heartbeat, with the blood drained from the brain, and with no measurable brain activity. They have been reported to happen with a minimal amount of stress, that is, without being near death.
The third criterion is the scope of the conclusion, and the scope of this conclusion is limited to consciousness surviving the body. The conclusion claims that we can know that consciousness survives bodily death.
The fourth criterion is the truth of the premises. To know if the premises are true, we need corroboration of the testimonial evidence, a high degree of consistency, and firsthand testimony. In all or most of these cases, it seems clear that we have all three. We have millions of accounts that can be corroborated by family members, friends, doctors, nurses, and hospice workers. Corroboration is important in establishing some objectivity to what is a very subjective experience. It gives credence and credibility to the accounts. One example of corroboration is given in Pam's NDE out of Atlanta, GA, which can be seen on YouTube, although the video is old.
Consistency is also important to the establishment of the truth of the premises. We have a high degree of consistency across a wide variety of reports. What are these consistent reports?
1) Seeing one's body from a third person perspective, that is, from outside one's body, and hearing and seeing what is happening around their bodies.
2) Having intense feelings of being loved, intense feelings of peace, and the absence of pain.
3) Seeing a light or tunnel in the distance and feeling that one is being drawn to the light, or moving towards the light.
4) Seeing deceased loved ones.
5) Seeing beings of light that one may interpret as Jesus, Mary, Muhammad, an angel, or just a loving being that one may feel connected with.
6) Heightened sensory experiences, namely, feeling that one is having an ultra-real experience, as opposed to a dream or a hallucination. This happens even when there is no measurable brain activity.
7) Communication that happens mind-to-mind, not verbally.
8) Seeing beautiful landscapes.
9) Seeing people who are getting ready or waiting to be born.
10) Having a life review by a loving being who is not judgmental, but simply showing you how important it is to love, and the importance of your actions on those you come in contact with.
11) Feeling as though one has returned home. This is also confirmed by people who were told they chose to come to Earth.
12) A feeling of oneness with everything, as though we are part of one consciousness.
13) Memories of who they are return, as though they temporarily forgot who they were, and where they came from.
14) There are also reports of knowledge returning, and many questions being answered as quickly as they think of the question.
15) Understanding that ultimately we cannot be harmed and that everything is perfect as it is.
16) That we are eternal beings simply entering into one of many realities. We are simply higher beings that choose to have a human experience. Ultimately, we are not human, being human is just a temporary experience. Our humanity ends when we die, then we assume our original form.
Another aid in establishing the truth of the testimonial evidence is firsthand accounts, as opposed to hearsay. There are thousands of firsthand accounts being reported by the International Association of Near-Death Studies, and according to polling, there are many millions of firsthand accounts.
The fifth criterion is the cogency of the premises. Whether the argument is cogent for you depends on many factors, but many people have heard of near-death experiences, so the concept is not an unfamiliar one. It is not going to be cogent for everyone, but with a little study and reading it can be cogent. It is not difficult to understand the concept. Although it is probably going to be difficult to understand how it is metaphysically possible. This argument claims that it is highly probable that consciousness survives the death of the body, and that the conclusion is very strong based on what makes for a strong inductive argument.
The further claim of this argument is that I know that I know the conclusion is true. Is it possible the conclusion is wrong? Of course it is possible, but we do not want to base a belief on what is possible, but on what is likely the case. All kinds of things are possible, but that does not mean we should believe them.
I could add more to the argument, but this is the crux of the argument.