A critical thinker is someone who uses particular criteria to evaluate reasoning, form positions, and make decisions.
Critical thinking is the intellectually disciplined process of actively and skillfully conceptualizing, applying, analyzing, synthesizing, and/or evaluating information gathered from, or generated by, observation, experience, reflection, reasoning, or communication, as a guide to belief and action. In its exemplary form, it is based on universal intellectual values that transcend subject matter divisions: clarity, accuracy, precision, consistency, relevance, sound evidence, good reasons, depth, breadth, and fairness.
Diestler, S. (1998). Becoming a critical thinker : a user friendly manual.
Defining Critical Thinking. (2019). The Foundation for critical thinking. Retrieved from http://www.criticalthinking.org/pages/defining-critical-thinking/766