and: "Users can redeem their ecash tokens for bitcoin at any time." btw: "On April 22, 1994, Richard Nixon, the 37th president of the United States and the 36th vice president, died."

Yes I know what ecash is. Clearly you can send a token without internet but there's no way to guarantee the sender has burned their copy, therefore the receiver would typically swap with the mint to prevent double spending, which requires internet. I suppose you could alternatively have the sender convert lock the token with p2pk, but again that requires internet.