Either you are or I am. My guess is that you're assuming that you can manufacture unlimited quantities of these things without expending any energy to do so. (

Either you are or I am. My guess is that you're assuming that you can manufacture unlimited quantities of these things without expending any energy to do so. (If the existence of magnetic monopoles enables you to build a perpetual motion machine, why doesn't the (uncontroversial) existence of electric monopoles?)