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The Oraculum is a Penrose wallpaper. A whole room is covered with it. The walls are covered with an aperiodic tiling constructed from two kind of rhombuses. There is a QR code in the middle of each shapes. They are all different. To decipher them the visitors get senteces. (Google Googles is very handy.) The sentences hidden behind the QR codes sometimes are funny, sometimes provovative. Some of them - the chance is very small though - they are made the visitor chage his life.
The text behind the QR codes made by a software. The software uses a restricted sentence construction with a restricted set of words. Practically it can generate endless sentences. The sentences are grammatically correct, so human mind can understand them. But the sofware does not care about meaning. The algorhytm has no sense about meaingns.