It seems that you're really saying that your values are immutable. For the rest of us, it seems we follow the line of thinking that, if our mental model (or "s

It seems that you're really saying that your values are immutable. For the rest of us, it seems we follow the line of thinking that, if our mental model (or "struct", if you will) has values (or types with fields/properties, if you will), that our mental model can be changed to reflect lessons learned (or, our values are inherently mutable, if you will).