Union
$$A \cup B =$$
{ becoming, being, concomitant variations, difference, direct agreement, joint agreement and difference, knowing, residue, willing }
Symmetric Difference
$$A \ominus B =$$
{ becoming, being, concomitant variations, difference, direct agreement, joint agreement and difference, knowing, residue, willing }
Difference
$$A - B =$$
{ becoming, being, knowing, willing }
Difference
$$B - A =$$
{ concomitant variations, difference, direct agreement, joint agreement and difference, residue }
Cartesian Product
$$A \times B =$$
{ (becoming, concomitant variations),
(becoming, difference),
(becoming, direct agreement),
(becoming, joint agreement and difference),
(becoming, residue),
(being, concomitant variations),
(being, difference),
(being, direct agreement),
(being, joint agreement and difference),
(being, residue),
(knowing, concomitant variations),
(knowing, difference),
(knowing, direct agreement),
(knowing, joint agreement and difference),
(knowing, residue),
(willing, concomitant variations),
(willing, difference),
(willing, direct agreement),
(willing, joint agreement and difference),
(willing, residue) }
Mill's Methods