; "You will face many decisions"
  (= __ (if (false? (= 4 5))
          :a
          :b))

  ; "Some of them leave you no alternative"
  (= __ (if (> 4 3)
          []))

  ; "And in such a situation you may have nothing"
  (= __ (if (nil? 0)
          [:a :b :c]))

  ; "In others your alternative may be interesting"
  (= :glory (if (not (empty? ()))
              :doom
              __))

  ; "You may have a multitude of possible paths"
  (let [x 5]
    (= :your-road (cond (= x __) :road-not-taken
                        (= x __) :another-road-not-taken
                        :else __)))

  ; "Or your fate may be sealed"
  (= 'doom (if-not (zero? __)
          'doom
          'more-doom))

  ; "In case of emergency, go fast"
  (= "pretty fast"
     (explain-exercise-velocity __))

  ; "But admit it when you don't know what to do"
  (= __
     (explain-exercise-velocity :watching-tv))