Assertion: difference engine | /r/HasProperty | digital device
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Source sentences:
text: The Difference Engine was a digital device: it operated on discrete digits rather than smooth quantities, and the digits were decimal (0–9), represented by positions on toothed wheels, rather than the binary digits (“bits”) that the German mathematician-philosopher Gottfried Wilhelm von Leibniz had favoured (but did not use) in his Step Reckoner.