F That We Can't Be Sure brings together the story of two couples, a husband and wife going through IVF and Abraham and Sarah from the book of Genesis, finding overlap in the grief of infertility even as their lives are seemingly far apart. Before the medicine cabinet, beneath the Mesopotamian sky-the speaker in these poems is science-based but God-haunted-or the other way around-as one couple's life is overtaken by doctors' appointments, shots, and measurements, and the other waits for theophany with nothing but time, an octogenarian and nonagenarian already. Resourceful, these frank poems corroborate themselves with language learned along the way, an insider's account and feelings.