Which of the following statements about hypothetical-deductive thought is true?
1) Hypothetical-deductive thought is seen only after thinking has advanced beyond egocentrism.
2) Hypothetical-deductive thought allows one to consider propositions that may or may not reflect reality.
3) A hallmark of hypothetical-deductive thought is the ability to think of that which is not present.
4) A hallmark of hypothetical-deductive thought is the ability to engage in inductive reasoning.