According to Oxford dictionary, self driving implies: > capable of travelling without input from a human operator, by means of computer systems working in conj

According to Oxford dictionary, self driving implies: > capable of travelling without input from a human operator, by means of computer systems working in conjunction with on-board sensors. A taxi clearly does not match this definition, since it has a human operator. I assume we are not just making up words ourselves, because that would be meaningless. What definition are you referring to that would match your usage?