Letter: All in the mind

Your article on George Dyson (Hypewatch, ISM, 31 January) mentions a dynasty of techno-gurus. You might have mentioned his mother, Verena Huber-Dyson, a distinguished mathematical logician.

On retirement off the coast of British Columbia, she joined the local yacht club to learn navigation. When the class was assigned exercises, the other potential yachtspersons complained that "that lady" always solved all the problems in her head.

IAN HACKING

All Souls College

Oxford