what type of fallacies is
Letter to the editor: “Andrea Keene’s selective morality is once again showing through in her July 15 letter. This time she expresses her abhorrence of abortion. But how we see only what we choose to see! I wonder if any of the anti-abortionists have considered the widespread use of fertility drugs as the moral equivalent of abortion, and, if they have, why they haven’t come out against them, too. The use of these drugs frequently results in multiple births, which leads to the death of one of the infants, often after an agonizing struggle for survival. According to the rules of the pro-lifers, isn’t this murder?” — North-State Record
The fallacy used in this argument is referred to as a "tu quoque" or "you too" fallacy. This fallacy occurs when someone avoids addressing the argument by instead questioning the consistency or hypocrisy of the person making the argument.
In the given letter to the editor, the author tries to undermine Andrea Keene's argument against abortion by pointing out a potential inconsistency in her stance. The author argues that if pro-lifers truly believe that abortion is immoral, they should also oppose the use of fertility drugs that can lead to the death of one of the infants.
While this argument may raise a valid question about consistency, it does not directly address or counter the original argument against abortion. Instead, it attempts to discredit the argument by suggesting that the person making it is not consistent in their beliefs.
To identify this fallacy, it is important to recognize when an argument shifts the focus from addressing the main argument to attacking the credibility or consistency of the person making the argument. In this case, the focus is shifted from the morality of abortion to the potential inconsistency of the pro-lifers' stance on fertility drugs.