Great majority of judgments are for preserved area. But we can continue this oscillation with ever more increasing ellipsoids until we reach the point at which the figure collapses into parallel lines joined at the ends, thus demonstrating that area is not preserved under shape transformation for constant perimeter. Intuition leads most people to say initially that area is preserved, even though most 'know' that a circle provides the largest area for a given perimeter value. Logical operations of reversibility are available to all adult judges, but the operation does not lead to the correct conclusion. Knowledge of a domain is essential to correct responses.
Syntactic rules are formal descriptions over abstract notions.
Syntax should be after concrete or formal operational stages. Pick up the elephant that s jumping . Empirical conclusion Toddlers have complex syntax. Piaget Language is a cognitive system. Cognition has multiple systems.