In the offset-printed poster for a 90’s exhibition at Malmö Konsthall, the sculpture in the foreground is composed of a series of distorted steel letters and numbers. This sequence of symbols is reminiscent of those that appear regularly on our screens, so-called captchas, which we are asked to identify to prove that we are not machines. However, in Sphinx the order of things seems to come undone: How come we see something resembling a captcha in a 1992 poster, when this web phenomenon appears only years later? Are we in fact looking at a riddle designed for a (then) future setting?