This post contains the most unusual explanation of blockchain I've seen. "That whole MARC code and the ISBN numbers on every book is managed by the U.S. Library of Congress and that ensures that no two books end up in the same spot on a bookshelf. So in essence, what I'm doing is I'm checking out the book and checking it back in without taking it for good.... So blockchain is exactly the same thing. It allows me to check in and out my transcript or other smart contracts, but I can't change it. And no two contracts or no two transcripts can end back in the same spot that they left. And therefore, it's a secure mechanism to make sure that people aren't using other people's information or data." If that explanation works for you, great, but I think it suffers the problem of explaining something complex with reference to something evn more complex.
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