> BTW, I suggest to cover one more issue with local variables, namely
> whether arguments to a function are seen in sub-functions, which are
> IMHO a very good addition to `let` and `let*` to write clean and
> readable code – often much more readable than anonymous lambda
> expressions.
>
> Example:
D'oh, this should be
```
(define (foo bar)
(define (baz)
...
(if bar) ; Is 'bar' visible here? If yes, when is
... ; 'bar' expanded? At the time 'baz' is
; defined? At the time 'baz' is executed?
```
Werner
