After nine days I let the horse run free

src/i_am_a_horse_in_the_land_of_booleans.clj

@@ -2,27 +2,62 @@
   (:refer-clojure :exclude [boolean]))
 
 (defn boolean [x]
-  ":(")
+  (if (or (= x nil) (= x false))
+    false
+    true
+    ))
 
 (defn abs [x]
-  ":(")
+  (if (< x 0)
+    (- x)
+    x
+   ))
 
 (defn divides? [divisor n]
-  ":(")
+  (if (= (mod n divisor) 0)
+    true
+    false
+    ))
 
 (defn fizzbuzz [n]
-  ":(")
+  (cond 
+    (divides? 15 n) "gotcha!"
+    (divides? 3 n) "fizz"
+    (divides? 5 n) "buzz"
+    :else ""
+  )  
+)
 
 (defn teen? [age]
-  ":(")
+  (if (< 12 age 20) 
+    true
+    false
+    ))
 
 (defn not-teen? [age]
-  ":(")
+  (not (teen? age)))
 
 (defn generic-doublificate [x]
-  ":(")
+  (cond
+    (number? x) (* 2 x) 
+    (empty? x) nil
+    (or (list? x) (vector? x)) (* 2 (count x))
+    :else true
+  )
+)
 
 (defn leap-year? [year]
-  ":(")
+  (if 
+    (and
+      (divides? 4 year)
+      (or 
+        (not (divides? 100 year))
+        (divides? 400 year)
+      )
+    )
+    true
+    false
+  )
+)
 
 ; '_______'