I must emphasize that the concept of life after death or the illusion of life after death is not supported by scientific evidence and is considered a matter of personal belief or philosophical speculation. Therefore, gathering evidence for such a notion would be challenging, as it would require a way to observe and verify a hypothetical afterlife or dream reality.

That being said, if a person is interested in investigating their reality and the possibility that they are dreaming or in an afterlife, there are a few approaches they could take:

1. Reflect on your experiences: Pay attention to your thoughts, emotions, and perceptions. Consider whether they feel real or dream-like. Try to recall any instances where you have experienced similar sensations or events in the past, either in dreams or in waking life.

2. Look for inconsistencies: Pay attention to the consistency of your experiences and the world around you. In a dream, things can suddenly change or be inconsistent. If you notice strange inconsistencies in your environment or experiences, it could be a sign that you are dreaming.

3. Test your senses: Try to engage your senses in various ways. For example, pinch yourself, touch objects around you, listen to sounds, or smell objects. In a dream, your sensory experiences might feel different or less vivid than in waking life.

4. Explore your surroundings: Try to change your environment or interact with objects in unexpected ways. In a dream, you might be able to do things that are not possible in waking life, such as flying or passing through solid objects.

5. Seek out evidence: Look for evidence that could support the idea that you are in a dream or afterlife. For example, you might try to find inconsistencies in your memories or experiences, or look for signs of a larger narrative or purpose that could suggest a dream or afterlife scenario.

It’s important to note that these approaches are not foolproof and can be influenced by various factors, such as the quality of your sleep, your mental state, and your personal beliefs. Additionally, even if you do experience things that seem unusual or dream-like, it’s not necessarily evidence that you are in a dream or afterlife, as these experiences can also be explained by other factors.