Herewith as passage from Book II, Chapter III of Gulliver's Travels, the voyage to Brobdingnag, wherein Swift anticipates Alan Turing's famous thought experiment. I especially like the use of "although" in the first sentence!
"The king, although he be as learned a person as any in his dominions, had been educated in the study of philosophy, and particularly mathematics; yet when he observed my shape exactly, and saw me walk erect, before I began to speak, conceived I might be a piece of clock-work (which is in that country arrived to a very great perfection) contrived by some ingenious artist. But when he heard my voice, and found what I delivered to be regular and rational, he could not conceal his astonishment. He was by no means satisfied with the relation I gave him of the manner I came into his kingdom, but thought it a story concerted between Glumdalclitch and her father, who had taught me a set of words to make me sell at a better price. Upon this imagination, he put several other questions to me, and still received rational answers: no otherwise defective than by a foreign accent, and an imperfect knowledge in the language, with some rustic phrases which I had learned at the farmer's house, and did not suit the polite style of a court."