 
 <translate> Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: The biker can't have a helmet and no helmet on at the same time.
 The question and answer: <hau> Ganin dalilin, samar da wata tambaya mai ma'ana da amsa. Tsarin tunani mataki-mataki: Mai babur ba zai iya samun kwalkwali da kwalkwali a lokaci guda ba.  Tambaya da amsa: 