"Drugs, talk-control, hidden superbeings who created you from scratch to be mistaken from that.  In Golarion, Suggestions and more classified forms of mind-control magic, gods directly messing with you, hidden superbeings who could mess with gods."

"If one day you started adding 1 and 1 and getting 3 every time, including for things like adding a gold piece to a gold piece and getting 3gp, you would eventually decide your old memories had been mistaken.  It's a kind of pattern you would be able to notice, if it were true.  So the probability that all of yourself assigns to it isn't 0."

"Drugs, talk-control, hidden superbeings who created you from scratch to be mistaken from that.  In Golarion, Suggestions and more classified forms of mind-control magic, gods directly messing with you, hidden superbeings who could mess with gods."

"If one day you started adding 1 and 1 and getting 3 every time, including for things like physically adding an apple to an apple in a basket and getting three apples, you would eventually decide your old memories had been mistaken.  It's a kind of pattern you would be able to notice, if it were true.  So the probability that all of yourself assigns to it isn't 0."

"Drugs, talk-control, hidden superbeings who created you from scratch to be mistaken about that.  In Golarion, Suggestions and more classified forms of mind-control magic, gods directly messing with you, hidden superbeings who could mess with gods."

"If one day you started adding 1 and 1 and getting 3 every time, including for things like physically adding an apple to an apple in a basket and getting three apples, you would eventually decide your old memories had been mistaken.  It's a kind of pattern you would be able to notice, if it were true.  So the probability that all of yourself assigns to it isn't 0."