Summarize and simplify the following definition

At this stage, children begin to develop abstract thinking, deductive reasoning and an overall increased ability to think systematically and symbolically.

Not all children reach the formal operational stage, says Dr. Ajayi. “Those who don’t will demonstrate marked inabilities to perform mathematical calculations, think creatively, use abstract reasoning or imagine the outcome of particular actions. They also fail to develop deductive logic, a skill that is critical in the math and science,” he says

While adolescents who don’t reach the formal operational stage may make decisions that result in scholastic or legal issues, those who do reach this stage tend to show interest in more abstract studies such as philosophy, religion, ethics and politics, says Dr. Ajayi.

Children also develop the capacity for systematic thinking in the formal operational state, says Porche. “Kids’ thinking starts with a hypothesis that is deduced to testable inferences, and they are able to isolate and combine variables to come to a logical conclusion.”

Adolescents are also able to assess the logic of statements without the existence of real-world circumstances. “They are capable of abstract thinking that goes beyond the here and now as they use rules, principles and theories to assess cause and effect when considering possibilities and realities,” she says.

Children in the formal operational stage begin to develop abstract thinking, deductive reasoning, and the ability to think systematically and symbolically. Some children may not reach this stage, which can impact their skills in math, creativity, abstract reasoning, and logical thinking. Adolescents who do reach this stage may show interest in abstract subjects like philosophy and ethics. In the formal operational stage, children can form hypotheses, test inferences, and come to logical conclusions by isolating and combining variables. They are also able to assess the logic of statements without real-world circumstances and use rules and theories to evaluate cause and effect.