How certain are you that your reality is real?
Dreams show us that you accept your reality, often completely absurd, as real.
Therefore your reality might not be genuine.
You might be dreaming. You might be in a new simulation that is only hours old, but you think your reality is years old.
How certain are you that your memories are genuine?
Sometimes I am told something and my brain says "I don't remember that. Oh yes I do, that's right".
Did I remember or did my brain create the sensation of remembering and build a false memory based upon suggestion?
My point is, don't be over confident with what you experience or remember. Question your reality. Question your thoughts. Question your memories.