I mean I could secretly be an alien that has code in my DNA or hidden somewhere that's triggered by being in a certain position or environment or situation. If it's sophisticated enough I may simply be mimicking behavior in order to blend. I could also be generating a simulation and none of this is real, or this is a distant memory that my true self is viewing from another dimension.

Truth being that we'll never know 100% what existence is, but I do believe that reducing suffering in this reality is important, even if none of this ultimately matters, because subjectively to us as individuals, it does matter.