According to piaget, the level of reasoning is reached when someone has the ability to use hypothetical-deductive reasoning.
true / false.

The complete and correct question is as follows:

According to Piaget, the level of reasoning is reached when someone has the ability to use hypothetical-deductive reasoning.

And answer would be - Formal operational.

Explanation:

According to Piaget, the formal operational level begins at the age of 12 and ends in adulthood. It is the level or stage of reasoning where adolescents gain the ability to develop thinking in an abstract way by influence or manipulate ideas in their brain without any external influence.

When an individual is capable of using hypothetical deductive reasoning that individual reaches the formal operation stage.

Thus, the correct answer is - Formal operational.