Nevertheless, it was apparent that Thon Taddeo was impressed. "My time here is limited," he went on. "From what I have seen, I suspect that it will take twenty specialists several decades to finish milking the Memorabilia for understandable information. Physical science normally proceeds by inductive reasoning tested by experiment; but here the task is deductive. From a few broken bits of general principles, we must attempt to grasp particulars. In some cases, it may prove impossible. For example-" He paused for a moment to produce a packet of notes and thumbed through them briefly. "Here is a quotation which I found buried downstairs. It’s from a four-page fragment of a book which may have been an advanced physics text. A few of you may have seen it."