given that the starting material and products are the same. Therefore, the heuristic using the 450 extent of alkyl substitution to gauge stability should apply. However, while some addressed this resource, the predominant resource that gained the most attention was the major and minor product labels, which guided the construction of the RCD. This finding reiterates the importance of metacognition during problem-solving. During the interview, students were not coached to rethink their solutions.