This paper compares some characteristics of critical thinking promoted in science classes with characteristics of a type of thinking which we have called anti-critical, promoted by some social actors. For this purpose, firstly, we analyze the conceptualizations of critical thinking, especially its evaluative character based on quality standards. Next, we examine some examples of anti-critical thinking that deliberately violate the standards of clarity and precision intended to be developed at schools. Finally, we conclude by stressing the importance of promoting specific interdisciplinary instruction on anti-critical thinking in the classroom.