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

(not= -1 (.indexOf '(101 102 103) 102))

Works, but below is better:

(some #(= 102 %) '(101 102 103))