For example, Mary Ann Warren suggests consciousness (at least the capacity to feel pain), reasoning, self-motivation, the ability to communicate, and self-awareness.[62] According to Warren, a being need not exhibit all of these criteria to qualify as a person with a right to life, but if a being exhibits none of them (or perhaps only one), then it is certainly not a person. Warren concludes that as the fetus satisfies only one criterion, consciousness (and this only after it becomes susceptible to pain),[63] the fetus is not a person and abortion is therefore morally permissible.