Martin, a concert pianist, was walking down the street when he was struck by Jeffrey, a careless skateboarder. Martin was knocked down and crushed his hand. When Martin sued Jeffrey for his negligence, claiming the loss of income from his profession (he could never play the piano again), Jeffrey countered with the defence that there was no way he could have anticipated that the person he was going to hit was a concert pianist.

Applying the most relevant principle of law, explain his likelihood of success in raising this defence.