If you want to talk about abortion and pretending that certain things never happened, why don't you start with the church's willful forgetfulness of its own past teachings on abortion, including most especially the fact that the church didn't officially enshrine into its canonical teaching the belief that life begins at conception until the late 19th century? Or do you just enjoy pretending? As for the supreme role of the conscience in Catholic teaching, that is supported by Vatican II, the highest authority in the Catholic Church, higher even than the authority of the current Roman pontiff.