Union
$$A \cup B =$$
{ ambiguities, analysis, application, comprehension, distortion, evaluation, fiction, knowledge, paradox, synthesis }
Symmetric Difference
$$A \ominus B =$$
{ ambiguities, analysis, application, comprehension, distortion, evaluation, fiction, knowledge, paradox, synthesis }
Difference
$$A - B =$$
{ analysis, application, comprehension, evaluation, knowledge, synthesis }
Cartesian Product
$$A \times B =$$
{ (analysis, ambiguities),
(analysis, distortion),
(analysis, fiction),
(analysis, paradox),
(application, ambiguities),
(application, distortion),
(application, fiction),
(application, paradox),
(comprehension, ambiguities),
(comprehension, distortion),
(comprehension, fiction),
(comprehension, paradox),
(evaluation, ambiguities),
(evaluation, distortion),
(evaluation, fiction),
(evaluation, paradox),
(knowledge, ambiguities),
(knowledge, distortion),
(knowledge, fiction),
(knowledge, paradox),
(synthesis, ambiguities),
(synthesis, distortion),
(synthesis, fiction),
(synthesis, paradox) }
Optical illusion