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Some potential use cases:

- Using Merkle trees, we can assign every node a hash-based ID. So now we can refer to other nodes by ID. This lets us store a graph whose vertices are all the tree nodes.

- With the graph, we can now reference bindings not by string literal, but by ID. This eliminates shadowing problems and missing imports.

- There is now one source of truth for the names of variables and functions. As a result, in source control, a commit that renames something is a one-line change.

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