Chelish diplomats, unlike virtually anybody else in Cheliax, have training in how to not lie unless there's an actual reason for it. Is there a reason for it here? He needs a snap decision and Antonio's snap decision is that they don't want her obsessing about a problem that doesn't exist at the expense of all the other technology she might helpfully try to teach them.
"When people die, their 'soul', which - I think contains their directed-continuity-of-experience though I'm not sure I quite understand the word, it maps onto 'soul' if it maps onto anything in my language - goes to one of the nine major places-people-go-when-they-are-dead, possibly to the realm of some particular 'god' if they -" No word for 'worshipped'. "- were associated with that 'god' during their lifetimes."