There are no inconsistencies in the Discworld books; ocassionally, however, there are alternate pasts.

Writing, for me, is a little like wood carving. You find the lump of tree (the big central theme that gets you started), and you start cutting the shape that you think you want it to be. But you find, if you do it right, that the wood has a grain of its own (characters develop and present new insights, concentrated thinking about the story opens new avenues). If you're sensible, you work with the grain and, if you come across a knot hole, you incorporate that into the design. This is not the same as 'making it up as you go along'; it's a very careful process of control.

Verence would rather cut his own leg off than put a witch in prison, since it'd save trouble in the long run and probably be less painful.

Anyway, it's like with bikes,' said the first speaker authoritatively. 'I thought I was going to get this bike with seven gears and one of them razorblade saddles and purple paint and everything, and they gave me this light blue one. With a basket. A girl's bike.' 'Well. You're a girl,' said one of the others. 'That's sexism, that is. Going around giving people girly presents just because they're a girl.

Making money isn't something to be ashamed of. There's a feeling now that if you have money you must have got it by some kind of shady dealing or being an MP.

When Mister Safety Catch Is Not On, Mister Crossbow Is Not Your Friend.

Poets have tried to describe Ankh-Morpork. They have failed. Perhaps it's the sheer zestful vitality of the place, or maybe it's just that a city with a million inhabitants and no sewers is rather robust for poets, who prefer daffodils and no wonder. So let's just say that Ankh-Morpork is as full of life as an old cheese on a hot day, as loud as a curse in a cathedral, as bright as an oil slick, as colourful as a bruise and as full of activity, industry, bustle and sheer exuberant busyness as a dead dog on a termite mound.