The ability to think logically about abstract propositions is indicative of the stage of __formal operations___.
According to Piaget Theory, Children develop cognitively and process information as they grow and mature in four stages which are
Sensorimotor Stage
Preoperational Stage
Concrete Operational Stage
Formal Operational Stage
The Formal Operational Stage spans from adolescence through adulthood. Here children develop from analyzing and interpreting concrete objects to improving their logic reasoning. They are able think and analyse abstract situations and hypothetical principles.