A lot of people ask these questions and I don't deny that curiosity on this subject can drive someone to distraction. Religions... governments... media... parents... friends and everyone else will give us information that we use to build up what we know of the world. I answered a different question to the one you posed. I see people fighting and arguing over whose idea is the real one without concrete scientific proof and I just sit back and let them agree to disagree or rip each other to pieces. I don't mind. I have my weed and my mission.

I only asked what point you were looking for as your idea may well have as much weight as any other idea.