user=> (def f (future (inc 0))) #'user/f user=> (future? f) true user=> (future? 1) false
user=> (def f (future (inc 0))) #'user/f user=> (future? f) true user=> (future? 1) false
user=> (def f (future (inc 0))) #'user/f user=> (future? f) true user=> (future? @f) false