Searching for evidence of critical thinking in discourse has roots in a definition of critical thinking put forth by Kuhn (1991),  which places more emphasis on the social nature of discussion and knowledge construction. There is limited research on the role of social experience in critical thinking development, but there is some evidence to suggest it is an important factor. For example, research has shown that 3- to 4-year-old children can discern, to some extent, the differential creditability  and expertise  of individuals. Further evidence for the impact of social experience on the development of critical thinking skills comes from work that found that 6- to 7-year-olds from China have similar levels of skepticism to 10- and 11-year-olds in the United States.  If the development of critical thinking skills was solely due to maturation, it is unlikely we would see such dramatic differences across cultures.
Adaptability, complex communication skills, non-routine problem solving, self-management, and systems-thinking are essential skills in the 21st-century workforce. From my perspective as a scientist and science educator, the most effective way to prepare students for the workforce and college is to implement and scale what is already known about effective learning and teaching. Content vs. process wars should be ancient history, based on the evidence from the learning sciences. Integrating core concepts with key skills will prepare students for the workplace and college. We need to move past mile-wide and inch-deep coverage of ever-expanding content in the classroom. Developing skills in the context of core concepts is simply good practice. It’s time to let go of polarizing debates, consider the evidence, and get to work.