What is rationality?

To be rational is to provide as many reasons, dig up as many facts, and call up as many beliefs as are necessary to provide a comprehensive logical web in support of any given belief. Rationality means "thinking and acting in accordance with reason" or thinking with good reasons. What is a "good reason"? If thinking is based on "facts," then the facts must be well confirmed, not simply hearsay or wild guesses. If thinking is based upon deductive reasoning, then the reasoning must be valid.