Thou shalt not be tempted to work the Three Laws of Robotics into a conversation between Kieran and Julia; Kieran knows Asimov, but he doesn't have the kind of thought process during this conversation that would bring that to the forefront of his brain. And he'd just confuse the hell out of Julia. Which would result in him having to digress to explain to her. Which would change the mood and flow of the conversation entirely.
This is on the level of "Thou shalt not tell your sub 'Kneel before Zod!'"
And "Thou shalt not grandiosely ask your goddess 'Give me the power to smite my enemies!' Especially when your goddess is Kali."