Exactly, because I cannot prove the past.
So you admit that.
Did I state it otherwise? If so, excuse that, please.
I think its irrelevant. The key difference is that
one is a "contract/agreement" where all the rules of the game
are laid out at the very beginning (i.e. genesis block), and the other
one , has participants that can change the rules as they go along.
Can you not see a difference?
Well, technically speaking, no. If it works like a checkpoint, looks like a checkpoint, it is a checkpoint.
I understand where you coming from. However, things change over time. So does the notion/definition of Bitcoin. I cannot tell you what Bitcoin will be in 2000 years from now. But it has to change if the community wants it to survive. It is like evolution.
I mean, take you as an example. At least your family, your friends, your neighbors etc. call you with the same name as they did 1, 2, 3, 4, 5 years ago. But is it what they call really you? You changed over time. Your identity card works like a checkpoint. However, it verifies your older self. However, it might work for many people as a checkpoint. Your "genesis block" is your birth certificate and it works like a checkpoint, too.
If it works like a checkpoint, looks like a checkpoint, it is a checkpoint.
Okay, I am out for today. Cya later guys.