"Non-Christians and even Christians can take opposite positions on abortion even when they think rationally, honestly, and with good will. The continuing controversy over abortion shows that it is a truly controversial issue. It is not simple and clear-cut, but complex. Just as the choices for action are often difficult for a woman contemplating abortion, the choices for thought are often difficult for open-minded philosophers."
"Everything I have said so far is a lie, in fact a dangerous lie."
Boston College philosopher Peter Kreeft explains why it is not only philosophically unsound, but willfully dishonest, to deny that personhood begins at conception. Article
here, Kreeft's homepage
here, Kreeft's enigmatic target
here.