Critical reading involves analyzing a text to understand not just what is explicitly stated but also what is implied or meant. Non-critical readers simply restate the facts presented, while critical readers make inferences about the author's purpose, tone, and potential biases. Inference goes beyond just restating information to considering what a text implies or means based on details and context clues. Critical readers use analysis to identify what aspects of a text are important and inference to interpret the deeper meaning of what is found.