Union
$$A \cup B =$$
{ concrete operational, formal operational, pre-operational, sensorimotor, to not abstain, to not eat at the wrong time, to not intoxicate, to not kill, to not lie, to not perform, to not sleep in a tall bed, to not steal }
Symmetric Difference
$$A \ominus B =$$
{ concrete operational, formal operational, pre-operational, sensorimotor, to not abstain, to not eat at the wrong time, to not intoxicate, to not kill, to not lie, to not perform, to not sleep in a tall bed, to not steal }
Difference
$$B - A =$$
{ to not abstain, to not eat at the wrong time, to not intoxicate, to not kill, to not lie, to not perform, to not sleep in a tall bed, to not steal }
Cartesian Product
$$A \times B =$$
{ (concrete operational, to not abstain),
(concrete operational, to not eat at the wrong time),
(concrete operational, to not intoxicate),
(concrete operational, to not kill),
(concrete operational, to not lie),
(concrete operational, to not perform),
(concrete operational, to not sleep in a tall bed),
(concrete operational, to not steal),
(formal operational, to not abstain),
(formal operational, to not eat at the wrong time),
(formal operational, to not intoxicate),
(formal operational, to not kill),
(formal operational, to not lie),
(formal operational, to not perform),
(formal operational, to not sleep in a tall bed),
(formal operational, to not steal),
(pre-operational, to not abstain),
(pre-operational, to not eat at the wrong time),
(pre-operational, to not intoxicate),
(pre-operational, to not kill),
(pre-operational, to not lie),
(pre-operational, to not perform),
(pre-operational, to not sleep in a tall bed),
(pre-operational, to not steal),
(sensorimotor, to not abstain),
(sensorimotor, to not eat at the wrong time),
(sensorimotor, to not intoxicate),
(sensorimotor, to not kill),
(sensorimotor, to not lie),
(sensorimotor, to not perform),
(sensorimotor, to not sleep in a tall bed),
(sensorimotor, to not steal) }
Cognition