I started to think about the Fear rules today after being called upon to make a fear check in a game. I was wondering about immunity to fear and looked up the rule Only the Insane Shall Prosper which reads 'If the first digit of a character's Insanity total is double or more a thing's fear rating the character is unaffected by it and does not need to make a fear check'.
By RAW this means if a character has an Insanity total of 8 or 9 then he is immune to Fear Rating 1,2,3 and 4.
I understand that this is obviously not the intent of the rule which is meant to say 'if the tens digit is double or more a thing's fear rating the character is unaffected by it and does not need to make a fear check' but I do find it amusing that there is a sweet spot where a Stable character is more resistant to fear than someone that is Deranged.