Ambrus
Explorer
Knowledge (architecture & engineering) represents an understanding of the physics, materials and mechanical principles necessary to design and oversee the construction of buildings, defensive structures and siege weaponry. It's hardly the kind of in-depth book-learning I'd associate with a streetwise layman like the rogue.
Rogues are familiar with traps and locks only insofar as bypassing them is involved. They're good at breaking them; most couldn't hope to craft anything that complicated. Their knowledge of mechanics is merely practical experience, hardly the result of scholarly interest and study. A rogue who's interested can study up on the subject if he wants to, but it's not easily accessible for him as it is for a wizard or bard character. The fact that rogues have no Knowledge beyond (local) as class skills makes perfect sense to me.
Rogues are familiar with traps and locks only insofar as bypassing them is involved. They're good at breaking them; most couldn't hope to craft anything that complicated. Their knowledge of mechanics is merely practical experience, hardly the result of scholarly interest and study. A rogue who's interested can study up on the subject if he wants to, but it's not easily accessible for him as it is for a wizard or bard character. The fact that rogues have no Knowledge beyond (local) as class skills makes perfect sense to me.