Union
$$A \cup B =$$
{ Correlation isn’t causation, Extraordinary claims need extraordinary evidence, Falsifiablity, Occam’s Razor, Replicability, Rule out rival hypotheses, concrete operational, formal operational, pre-operational, sensorimotor }
Symmetric Difference
$$A \ominus B =$$
{ Correlation isn’t causation, Extraordinary claims need extraordinary evidence, Falsifiablity, Occam’s Razor, Replicability, Rule out rival hypotheses, concrete operational, formal operational, pre-operational, sensorimotor }
Difference
$$B - A =$$
{ Correlation isn’t causation, Extraordinary claims need extraordinary evidence, Falsifiablity, Occam’s Razor, Replicability, Rule out rival hypotheses }
Cartesian Product
$$A \times B =$$
{ (concrete operational, Correlation isn’t causation),
(concrete operational, Extraordinary claims need extraordinary evidence),
(concrete operational, Falsifiablity),
(concrete operational, Occam’s Razor),
(concrete operational, Replicability),
(concrete operational, Rule out rival hypotheses),
(formal operational, Correlation isn’t causation),
(formal operational, Extraordinary claims need extraordinary evidence),
(formal operational, Falsifiablity),
(formal operational, Occam’s Razor),
(formal operational, Replicability),
(formal operational, Rule out rival hypotheses),
(pre-operational, Correlation isn’t causation),
(pre-operational, Extraordinary claims need extraordinary evidence),
(pre-operational, Falsifiablity),
(pre-operational, Occam’s Razor),
(pre-operational, Replicability),
(pre-operational, Rule out rival hypotheses),
(sensorimotor, Correlation isn’t causation),
(sensorimotor, Extraordinary claims need extraordinary evidence),
(sensorimotor, Falsifiablity),
(sensorimotor, Occam’s Razor),
(sensorimotor, Replicability),
(sensorimotor, Rule out rival hypotheses) }
Cognition