I do not know exactly, what 'fanon' is. I thought it's fan speculations, which are said to be true, but in canon it was never said (Everyone knows, that Vetinari has black hair, but it has never been said in any Discworld book).
For explanation of what I wrote, just some examples from some other fandoms: Many of us Trekkies have to deal with Final frontier or Spock's Brain. Yes, It's official Star trek, it's canon, but it doesn't fit into the world, that has been established by previous movies and TV series. We pretend Kirk never climbed the mountain and there's no Spock's insane brother. We pretend, that remote-controlled brainless Spock has never walked the Enterprise's corridors..
Or Star Wars, episodes I-III (well, some people would argue). It's Star Wars, it's canon, it has the same authors, but it has disappointed many fans. Midichloriams? Meh.
The same with UA in the Discworld series. It simply doesn't fit the world, which I have in my head after reading the previous Discworlds. It's a Discworld, it's a Pratchett's book, and I have to deal with it. But it ruins my image of Discworld, the city of Ankh-Morpork and the characters, so I try to pretend the terrible orc (I apologise to his fans) doesn't exist, Vetinari doesn't drink so much alcohol and this book did not happen at all, cos, frankly, there's nothing I would miss, if this book did not exist. Even Making Money has good bits, though I do not like that book, but UA gave me nothing. There's a Czech saying, which can be translated: Even a master carpenter sometimes cuts wrongly. Everyone makes mistakes.
For explanation of what I wrote, just some examples from some other fandoms: Many of us Trekkies have to deal with Final frontier or Spock's Brain. Yes, It's official Star trek, it's canon, but it doesn't fit into the world, that has been established by previous movies and TV series. We pretend Kirk never climbed the mountain and there's no Spock's insane brother. We pretend, that remote-controlled brainless Spock has never walked the Enterprise's corridors..
Or Star Wars, episodes I-III (well, some people would argue). It's Star Wars, it's canon, it has the same authors, but it has disappointed many fans. Midichloriams? Meh.
The same with UA in the Discworld series. It simply doesn't fit the world, which I have in my head after reading the previous Discworlds. It's a Discworld, it's a Pratchett's book, and I have to deal with it. But it ruins my image of Discworld, the city of Ankh-Morpork and the characters, so I try to pretend the terrible orc (I apologise to his fans) doesn't exist, Vetinari doesn't drink so much alcohol and this book did not happen at all, cos, frankly, there's nothing I would miss, if this book did not exist. Even Making Money has good bits, though I do not like that book, but UA gave me nothing. There's a Czech saying, which can be translated: Even a master carpenter sometimes cuts wrongly. Everyone makes mistakes.