but doing so in a way that does not create unintended negative consequences elsewhere. Her use of Venn diagrams seeks to ...

Check that a set does not include an element that is not in the universal set. Draw a Venn diagram for ξ = {positive whole numbers less than 10}, A = {prime numbers} and B = {even numbers}.

Our opening quote contended that Venn diagrams are overrated. Even those who agree must admit that they have a curious allure. Take the sets of interesting topics in logic, in geometry and in ...