“Critical judgments typically have tow key features: they are defended with arguments (compromising both verifiable evidence and reasoning), and they assert that others should agree with them (which does not imply the empirical fact that others necessarily do).”
Bardzell J., Bardzell S., and Stolterman E, 2014. Reading Critical Designs: Supporting Reasoned Interpretations of Critical Design. In Proc. of CHI 2014. ACM.