The contemporary explosion of information makes intellectual responsibility more needed than ever. The uncritical tend to believe too much that is unsubstantiated; the overcritical tend to believe too little that is true. A central problem for this paper is to formulate standards to guide an intellectually rigorous search for a mean between excessive credulity and indiscriminate skepticism. A related problem is to distinguish intellectual responsibility for what we believe from moral responsibility for what we do. A third problem is how to square intellectual responsibility in retaining our views with the realization that peers we respect disagree with us. Much of the paper is directed to articulating principles for dealing with such disagr...