Mary Anne Warren: "On the Moral and Legal Status of Abortion"

I. Challenge to Traditional Anti-Abortion Argument  

Traditional Anti-Abortion Argument (302):

(1) It is wrong to kill innocent human beings.

(2) Fetuses are innocent human beings.
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(3) It is wrong to kill fetuses.

Challenge:

Suppose the term “human beings” is used in the same sense in both premises. The term refers either to genetically human beings or to persons (humans in the moral sense). If "human beings" refers to genetically human beings, then (1) is questionable. If it refers to persons (i.e., full fledged members of the moral community), then (2) is questionable. 

But suppose the term "human beings" changes meaning in the course of the argument. The argument then contains an equivocation and is deductively invalid.

II. Persons vs. Non-persons

  1. consciousness and in particular the ability to feel pain

  2. reasoning; the capacity to solve new and complex problems

  3. self-motivated activity: activity that is relatively independent of either genetic or direct external control

  4. the capacity to communicate (on indefinitely many topics)

  5. the presence of self-concepts and self-awareness

III. Warren's Argument for a Pregnant Woman's Moral Right to an Abortion

A fetus is not a person. All and only persons have full moral rights (304). A fetus, therefore, does not have full moral rights. Moreover, ". . . a woman's right to protect her health, happiness, freedom, and even her life, by terminating an unwanted pregnancy, will always override whatever right to life it may be appropriate to ascribe to a fetus, even a fully developed one" (306). So a pregnant woman has a moral right to an abortion.

IV. Fetal Development and the Right to Life

V. Potential Personhood and the Right to Life

VI. Infanticide Objection


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