Judged: two independent readers; copy check clear.
Venn diagram
Venn diagram A Venn diagram is a logical diagram, historically associated with John Venn, that shows possible class combinations by overlapping figures such as circles or ellipses.
A Venn diagram is a logical diagram, historically associated with John Venn, that shows possible class combinations by overlapping figures such as circles or ellipses. The parts that conflict with the stated premises are shaded or otherwise removed, leaving the combinations that remain possible.