Abortion and the Slippery Slope

Consider the question of whether or not we can correctly say that a human fetus is a human being. I am inclined to believe that a negative answer is correct. Others disagree. They maintain that the fetus is a human being and usually advance some version of the “slippery slope” argument in support of that claim.

The general form of the argument is that, since in the nature of things all change is discrete and continuous, lines or boundaries cannot be found, held, or adequate...