user=> (gensym "foo") foo2020 user=> (gensym "foo") foo2027 user=> (gensym "foo") ;; ...
user=> (gensym "foo") foo2020 user=> (gensym "foo") foo2027 user=> (gensym "foo") ;; ...
(gensym "foo") ; => foo2020 (gensym "foo") ; => foo2027 (gensym "foo") ; => ...