Test whether a list contains a specific value in Clojure

Question

What is the best way to test whether a list contains a given value in Clojure?

In particular, the behaviour of contains? is currently confusing me:

Answer 1

I know that I'm a little bit late, but what about:

(contains? (set '(101 102 103)) 102)

At last in clojure 1.4 outputs true :)