Selective Memory is when the game denies the player knowledge his Player Character has, should logically have, or should be able to acquire effortlessly and instantly. That map of the world the the Player Character got from his uncle before heading out to save the planet? Features the Doomed Hometown and a whole lot of blank indicating everywhere you haven't been to yet. The soldier who joins the party and suggests you go to the Capital City to ask the king for help? Forget about asking him for directions. You come to the Hidden Elf Village and the White Magician Girl wants you to talk to her sister? Talk to Everyone until you find her yourself.