The ubiquity of the fallacy of composition in cognitive enhancement and in education.

Research into cognitive enhancement is highly controversial, and arguments for and against it have failed to identify the logical fallacy underlying this debate: the fallacy of composition. The fallacy of composition is a lesser-known fallacy of ambiguity, but it has been explored and applied extensively to other fields, including economics. The fallacy of composition, which occurs when the characteristics of the parts of the whole are incorrectly extended to apply to the whole itself, and the conclusion is false, should be addressed in the debate on cognitive enhancement and within education. Within cognitive enhancement, the premise that individual distinct cognitive processes can be enhanced by cognitive enhancers leads to the conclusion that they must enhance cognition overall, and this idea is pervasive in the literature. If the goal of cognitive enhancement is to enhance cognition or learning, and not merely individual cognitive processes, then this is a clear example of the fallacy of composition. The ambiguity of "cognitive," "cognition," and "enhancement" only perpetuates this fallacy and creates more confusion surrounding the purposes and goals of enhancement. Identifying this fallacy does not threaten the existing body of research; however, it provides a novel framework to explore new avenues for research, education, and enhancement, particularly through education reform initiatives. Education enhances and facilitates learning, and improvements to education could be considered cognitive enhancements. Furthermore, the same fallacy is ubiquitous in education; educators commit it by "teaching to the test" and prioritizing memorization over generalizable skills such as critical thinking and problem solving. We will explore these new avenues for research and highlight principles of learning success from other disciplines to create a clearer understanding of the means and ends of cognitive enhancement. Recognizing the pervasiveness of composition fallacy in cognitive enhancement and education will lead to greater clarity of normative positions and insights into student learning that steer away from fallacious reasoning.