[jnordwick]

Rust's new claim is now that references isn't immutable, it's shared by default. There is no concept of immutable data in rust. All data is mutable in various ways and that is a product of the binding not the data, from the cell interior mutability eupphamisn to shadowing in the same frame: (`let x = 2; let x += y;` is valid even though x isn't defined as mutable. The mental gymnastics a rust parishioner has to go thrown to shout down other languages while theirs fills with the same concepts is growing by the hour.