Final answer:
Formal operational thought is Piaget's concept that adolescents have the cognitive ability to develop hypotheses about problem-solving and deduce their implications.
Step-by-step explanation:
The concept in question is formal operational thought. According to Piaget's theory of cognitive development, this concept refers to the cognitive ability of adolescents to develop hypotheses about problem-solving and deduce their implications. During this stage, teenagers are capable of abstract thought, considering multiple points of view, imagining hypothetical situations, and forming new ideas.