I think he meant something like this: true == !0 == "0" == false Which still isn't that interesting, since it is much the same as: true == (false ==

I think he meant something like this: true == !0 == "0" == false Which still isn't that interesting, since it is much the same as: true == (false == false) More interesting, something like: > ! 0 == "0" false > 0 == ! "0" true Since "!" acts as if false === 0.