"Everyone's normal from their own perspective, and in Civilization, I do rather get the impression, killing people is considered much less normal than it is in Golarion."
"On the other hand, yes, my thought processes are relatively alien to you, so if a weird thing happens, you might assume I was the one more likely to do it."
"And when it comes to murders, if you can avoid killing somebody face-to-face who, you know, is getting resurrected a day later, you'd probably do it that way whether you were Keltham or Carissa."
"Let's say for purposes of thought experiment that all those considerations exactly cancel out. In fact, if we didn't know anything about the argument Ione saw, or know that the murderer could summon a lantern archon, and we just knew that Meritxell was killed by somebody not face-to-face, we would've thought that Keltham and Carissa were exactly equally likely to be the murderer."