Critical thinking skills help you analyze and evaluate messages more effectively. Critical listeners question what they hear, require support for assertions and claims, and evaluate the credentials of sources. Critical listeners differentiate among facts, inferences, and opinions. They become wary when language seems overly vague or incomprehensible, when inflammatory speech takes the place of cool reason, or when a message promises too much. When what they hear does not fit with what they know, critical listeners start asking the tough questions.