Carroll diagram Carroll diagram A Carroll diagram, Lewis Carroll's square, biliteral diagram or a "two-way table" is a diagram used for grouping things in a yes/no fashion. Numbers or objects are either categorised as 'x' (having an attribute x) or 'not x' (not having an attribute 'x'). They are named after Lewis Carroll, the pseudonym of Charles Lutwidge Dodgson. Although Carroll diagrams can be as simple as the first one above, the most well known types are those similar to the second one, where two attributes are shown. The <nowiki>'</nowiki>universe<nowiki>'</nowiki> of a Carroll diagram is contained within the boxes in the diagram,
Charles Dodgson (priest) "Fanny" Lutwidge and was thereby required to give up his college position. He was appointed to a college living as Perpetual Curate of All Saints' Church, Daresbury. Ten of their eleven children, including Charles Lutwidge, were born here. The living was not a wealthy one and Dodgson ran a school in the village to supplement his income. In 1836 he was additionally appointed Examining Chaplain to Charles Longley, the newly created Bishop of Ripon. During this period he and his wife educated all their children at home. The headmaster of Warrington School, Thomas Vere Bayne, who had studied at Jesus