leenia says "Greg, when one line goes up and one goes down, that's 'contrary motion.' ". "Contrary motion" normally refers to parts moving in opposite direction, but in the same rhythm (eg in four part harmony, when the bass often moves up when the tune goes down. The example I quoted was counterpoint, when the part moving up was in a completely different rhythm to the part going down, so the notes change at different times. That's counterpoint