"How come I remember that castle collapsing?" an Old Man nearby asked in confusion. "Why's it still standing?"
"Your mind's getting muddled," his similarly aged companion, an Old Man, said with a laugh. "That castle never collapsed. Otherwise, how could they use it for promotion?"
"It did collapse, actually. Many times," someone beside them said quietly. "Just not during the Great Tsunami, but afterward. The inside is all artificially reinforced now. It's completely become a man-made tourist attraction."
"It's to bring in tourism revenue. That's how it is," the other guests at the table nodded in agreement.
"They're everywhere nowadays. Find any rundown old house, call it some ancient Ruins, make up a magical legend, put up a sign, and start selling tickets.
"Didn't they uncover another cave two days ago? They said it was that legendary ancient cave full of treasure."
"No, I mean," the first Old Man scratched his head, "I remember it collapsing during the Great Tsunami. It was washed down in that tsunami. I even went fishing near the Ruins afterward."
"You must be getting old," the Old Man beside him said with a sigh. "I remember it never collapsing. I've lived here for so many years. There's no way I could be wrong."
"I remember it collapsing too," another Old Man nearby raised his head, looking at the castle as he spoke quickly.
"But I remember it not collapsing," yet another Old Man joined the argument.
"Wait," an Old Man raised a hand and pulled a book from his pocket. "I know what this is. I saw it just a couple days ago."
He opened the book to a page and pointed at an entry. "Look, this is called the 'Memory Displacement Effect.' During the transmission of information from the source to its spread, 'noise'