`with` is still lexically scoped—it just adds another scope to the lexical scope chain. The variables are still scoped to the beginning and end of a particular

`with` is still lexically scoped—it just adds another scope to the lexical scope chain. The variables are still scoped to the beginning and end of a particular block of code, and if that code calls out to a function that was defined outside of that block the variables don't follow to that called function (unless explicitly passed as arguments). From what I can tell, your CL example is truly dynamically scoped (assuming the global is defined with `defvar`)—functions defined outside of that `let` form will still use the version you give in the `let` when they're called inside that call tree. Where JavaScript does have a bit of dynamic scoping is with `this`. All OOP languages technically use dynamic scope for `this`, but JavaScript even more so since `this` can be rebound arbitrarily.