Problem
Isabel misplaced her laptop computer while at work and posted a reward on the office noticeboard stating that she will pay $200 to anyone who returned the computer to her undamaged. Ian, the office junior, noticed that the computer had carelessly been left in the lift one night after work and, noting the name tag on the inside cover, returned the computer to Isabel on his next shift. Ian had not seen the posted reward notice on the office noticeboard. Can Ian claim the $200 reward?