Equality
A is not equal to B
Subset
A is not a subset of or equal to B
Superset
A is not a superset of or equal to B
Union
{ fable, fairy-tale, folk-tale, metaphysics, myth, normative science, phenomenology, saga }
Symmetric Difference
{ fable, fairy-tale, folk-tale, metaphysics, myth, normative science, phenomenology, saga }
Difference
{ metaphysics, normative science, phenomenology }
Difference
{ fable, fairy-tale, folk-tale, myth, saga }
Cartesian Product
{ (metaphysics, fable),
(metaphysics, fairy-tale),
(metaphysics, folk-tale),
(metaphysics, myth),
(metaphysics, saga),
(normative science, fable),
(normative science, fairy-tale),
(normative science, folk-tale),
(normative science, myth),
(normative science, saga),
(phenomenology, fable),
(phenomenology, fairy-tale),
(phenomenology, folk-tale),
(phenomenology, myth),
(phenomenology, saga) }
Charles Sanders Peirce