Image taken from 'Principes de Logique, suivis de l'histoire et de la bibliographie d pg35 https://t.co/7MvADIFzvJ https://t.co/Dp4YNNgz7t - The Calculator Guide from Twitter

Image taken from 'Principes de Logique, suivis de l'histoire et de la bibliographie d pg35 https://t.co/7MvADIFzvJ pic.twitter.com/Dp4YNNgz7t

— Tʜᴇ Cᴀʟᴄᴜʟᴀᴛᴏʀ Gᴜɪᴅᴇ (@GuideCalculator) August 6, 2018

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August 06, 2018 at 11:34AM
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