The Critical Success and Failure results are used to establish boundaries on the best and worst results that one can achieve by attempting to use a given skill. However, care should be taken with these, as with all Critical Successes and Failures. Don’t have characters dying by Critically Failing a Chemistry attempt to recall a specific element, and don’t have them just “knowing” how to pilot an ancient jet fighter because they rolled a Critical Success. Unlike combat skills, the limits and uses of non-combat skills are far more open-ended and challenging to control. Also, don’t hesitate to put situational modifiers on these checks depending upon how favorable or unfavorable conditions are to use a given skill.