Polarity is simply the direction of flow, and doesn't necessarily have to do with electromagnetic charge. A moving stream of neutrons has, by definition, polarity in the direction of flow. Saying "I reversed the polarity of the neutron flow" is a fancy way of saying, "I made that shit go backwards."
In English, or Japanese?
"Out of context"? I don't think that phrase means what you think it means. My point was, your comment is vapid and short-sighted. Is it so important that every endeavor have an immediate, predictable benefit? The very same criticisms you're leveling against cosmology were leveled against Maxwell when he first started experimenting with the electromagnetic force. So, yes, my comment was very relevant. Who are you to say what is and is not "needed"?