A Carroll diagram, or Lewis Carroll's square, is a diagram used for grouping things in a yes/no fashion. Numbers or objects are either categorized 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.
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Because the founders grandma's name was Carroll.
The mathematical Carroll diagram was developed by Lewis Carroll. Carroll studied at the University of Oxford and later became a teacher of mathematics at Oxford.
Carroll is a name or it can meana Christmas Carroll But mostly it is used for A name !!
its a diagram
A diagram is a noun.