Introduction : what's the problem? -- The problem may lurk in Aristotle's ethics -- Aristotle's akratic : foreshadowing a solution -- A negligent omission at the root of all sinfulness : Anselm and the Devil -- Negligent vs. non-negligent : a Thomistic distinction directing us toward a solution -- Can I have your divided attention? : Scotus, indistinct intellections, and type-1 negligent omissions almost solved -- I can't get you out of my mind : Scotus, lingering indistinct intellections, and type-2 negligent omissions -- Scotus's affection-ate corrective : a possible final solution to a type-2 variant -- Neglected treatises help solve negligence : the action theory of Francisco Suarez -- An answer that cannot be neglected : the solution -- Appendix A : translation of Nicomachean ethics 1146b31-1147b19.