[gldalmaso]

Any mutable data store or versioned immutable data store that allows either the user or an administrator to manually correct the wrong input.

[davesque]

> immutable data store that allows either the user or an administrator to manually correct the wrong input.

Blockchains are this. What's to prevent a user or administrator from committing a "deletion" of some piece of data on the blockchain and then for users to refer to the most recent commit? That's how immutable data structures work.