logical_forms: (infer (heat lower world1) (speed lower world1) (speed lower world2)) (infer (heat lower world2) (speed lower world2) (speed lower world1))
logical_form_pretty: qrel(heat, lower, world1) -> qrel(speed, lower, world1) ; qrel(speed, lower, world2)
question: James discovered that rolling his yo-yo over a porcelain tile floor generated less heat than rolling it over his doormat. James' yo-yo moved slower over (A) porcelain tile (B) doormat