[tscs37]

The maintainer must decide which blocks are valid. That's just as much of a consensus algorithm as Bitcoin just not as distributed and decentralized.

[pests]

But isn't that exactly the point? That decision, with Bitcoin, is distributed and decentralized.

We've always been able to decide how to add an element to the end of a (possibly cryptographically secure) chain of blocks.

What separates the two definitions of blockchain in this thread is exactly the distributed and decentralized choosing of the top block.

[tscs37]

Yes, bitcoin is decentralized and distributed. But blockchains don't have to be inherently.