The inability to identify numbers or letters traced on the palm (or other parts of the body surface): Helen Keller did not experience agraphognosia so she was able to learn to write when her teacher traced numbers and letters on her palm.

Helen Keller (1880-1968) was a United States lecturer and writer who was blind and deaf from the age of 19 months as a result of a severe fever. Anne Sullivan taught her to read, to write, and to speak and since she was not hampered by agraphognosia, Helen even graduated from college with honors and went on to become an activist and lecturer in support of blind and deaf people.