Nolan’s code was ingenious and challenging because it disguised the days of the week in a cryptic way. He took the names of the days Monday through Thursday and dropped the letters “d-a-y,” leaving the remaining letters to form unusual words like “Nom” for Monday and “Utes” for Tuesday. This forced anyone decoding it to think abstractly and recognize patterns that weren’t obvious. The unwritten fifth word, “Fir,” symbolizing Friday, added another layer of complexity because it wasn’t explicitly written, requiring the solver to infer its existence. The code was difficult because it relied on both linguistic manipulation and contextual knowledge— understanding it was about days of the week and that the missing word referred to a fir tree linked to the jewellery’s hiding place. Such a code needed a sharp, logical mind to decipher, which Encyclopedia demonstrated through his keen reasoning and insight.