Another interesting point the "Generation Phenomenon" brings is it's verifiability. All the information would have to be historically accountable and provable. Archeology has played a large role in proving, disproving and establishing ancient documented fact and fallacy. So we would need to be able to verify any claim that God/s actually were here and did what they say they did.
Also, contained under the umbrella of the "Generation Phenomenon" is how each generation would discover unfolding events that were predicted in an ancient document. Furthermore these events may happen during the later generations to come. In other words the ancient document would have to contain predictions (or Prophecy) of coming events that will be watched by onlookers in generations to come.
Finally, and also to satisfy generations to come, as events unfolded would be: the ancient documents ability to be accurate with the sciences of the day. The document would have to know for instance something about the creation of our surroundings. Furthermore, they would have to be revealed in the ancient document prior to their discoveries. This is called word of knowledge. So our last criteria would be that the ancient document would reveal facts (or "Word of Knowledge") of our surroundings before we knew they actually existed.
Now that we have a minimal criteria lets review the summary list as follows:
If God/s showed up there would have to be a purpose for it to get a meaningful result. Therefore, the God/s must implement a system of factual records and archives for the imperfect humans to get it right for future generations. God/s determined that they had a purpose for us to fulfill and the God/s would want to relate their purpose to us. What ever the visiting God/s do it has to be fresh and renewable to every generation. The God/s would have to provide documentation (either written by their own hand or inspired). It would have to include their plan, and a way to live that pleases them, allowing all generations to refer to it for consultation. We would need to be able to verify any claim that God/s were actually here and did what they say they did. The ancient document would have to contain predictions (or Prophecy) of coming events that will be watched by onlookers in generations to come. The ancient document would reveal facts (or Word of Knowledge) of our surroundings before we knew they actually existed.
Next: What are the options? The first real step, is to investigate a few various thought processes concerning eternal life and where it comes from (if it truly exists). For instance, does eternal life exist because of God, a group of gods or is it a bi-product of the universe. Perhaps you don't think it exists at all! We will briefly evaluate these strings of thought through reason, logic and morality. This will help us determine the end result to each thought. As logical beings we know in order for eternal life to exist at least one of the following must exist in some form. So, let's review them quickly.
1. The universe is self-existent. 2. The universe exists by many gods who provide eternal life. 3. There is no God. 4. The universe is god. 5. There is no eternal life. 6. An eternal God created eternal life. 7. Is after life and eternal life the same thing?
These seven examples listed above are our starting point, and perhaps not complete: there may be other scenarios, but for now this can get us off to a great start. So, let's go over them now.