Introduction of the SLED acronym — four categories of differences between the unborn and born humans, none of which are morally relevant

Mike introduces the SLED acronym (Size, Level of Development, Environment, Degree of Dependence) as a tool for cataloging every significant way the unborn differs from adult humans. He argues that none of these differences are morally relevant to whether it is permissible to kill the unborn — the same logic that would justify killing the unborn on these grounds would justify killing toddlers, infants, and the elderly.