Clojure> (defn fuzz [x] ( * 1.23 ( / x 7 )) )
#'sandbox24027/fuzz
Clojure> fuzz 8
#<sandbox24027$fuzz sandbox24027$fuzz@3a790aaa>
Clojure> (fuzz 8)
java.lang.IllegalStateException: Attempting to call unbound fn: #'sandbox24027/fuzz
do ?Clojure> fuzz 8