Is there an explanation of how clojure deals with scoping and its static 
checking. It seems to be a hybrid of a static language and a dynamic 
language when it comes to compilation. I'll elaborate.

The following code wont compile:
(defn x [] nil)
(defn y[]) ((x))

however this code will compile:

(defn foo[] (defn x[] nil))
(defn y[]) ((x))

but calling y before foo fails with a runtime exception.

Also, the following code:

(println "hello")
(defn -main [args] 
  (println "world"))

prints "hello" at compile time
and also 
"hello
world" at runtime.

My conclusions from this is that the static symbol checker is actually 
fairly stupid and is just there to provide some simple sanity, and that all 
toplevel code in a namespace
is executed at compile time AND at runtime. Is this correct?

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