The brainstorm file is never updated. I keep putting some brain dump there without cleaning the previous brain dumps.
I think closures already work; I just haven't tested them enough.
> How it works is that every function has an environment. This environment contains two bits of information: a mapping between variables and values, and a reference to the outer environment.
> Then, when looking up a variable, you start in the current environment, and if it's not found, you check in the outer environment. You then repeat this process as many times as necessary until you either find the variable, or reach the global scope.
