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He suffers from a from of Alzheimer's called "posterior cortical atrophy".
It is a rare form, and unlike usual Alzheimer's, it does not deteriorate memory and such but rather affects the vision.
IE. The patient can speak and remember fine, but has difficulty writing or reading.
What else can I help you with?
How many kids does Terry Pratchett have?
Terry Pratchett had one daughter named Rhianna Pratchett.
What is the name of Terry Pratchett's cat?
Terry Pratchett's cat is called You.
What is the birth name of Terry Pratchett?
Terry Pratchett's birth name is Terence David John Pratchett.
When was Terry Pratchett born?
Terry Pratchett was born on April 28, 1948.
What is Terry Pratchett's birthday?
Terry Pratchett was born on April 28, 1948.
What is Terry Pratchett's motto?
Terry Pratchett's motto is 'Noli Timere Messorem'.
How tall is Terry Pratchett?
Terry Pratchett stood at a height of about 1.73 meters (5 feet 8 inches).
What is the duration of Terry Pratchett's Hogfather?
The duration of Terry Pratchett's Hogfather is 3.15 hours.
When was terry pratchett knighted?
Terry Pratchett was knighted during the 2009 New Year Honours.
When did Terry Pratchett's Going Postal end?
Terry Pratchett's Going Postal ended on 2010-05-31.
When was Terry Pratchett's Going Postal created?
Terry Pratchett's Going Postal was created on 2010-05-30.
When Terry Pratchett died?
As of today (June 26, 2013), Sir Terry Pratchett is still very much alive.
