Indeed, the Church does believe in the '
primacy of conscience' (as we've both discussed many times at length before):
“Man has the right to act in conscience and in freedom so as personally to make moral decisions. He must not be forced to act contrary to his conscience. Nor must he be prevented from acting according to his conscience." (Catechism of the Catholic Church, 1992)
"...No one ought to act against his own conscience and he should follow his conscience rather than the judgement of the church when he is certain...one ought to suffer any evil rather than sin against conscience..."
(Pope Innocent III (1198-1216) in his letter to Guleilma)
but it also teaches that baptized and confirmed Catholics have an obligation to try and
form their conscience according to the revealed moral law (the church's moral doctrine).
I'm not going to get into a debate on the distinction between intuition and reasoning but in my tradition, as you are aware, they are are both regarded as complementary elements of the one self-same moral decision-making process (hence the term, "
dual-process" á la Joshua Greene and team).
The reasoning is an important facet of the process in my paradigm but a secondary one, after the 'gut' impulse of intuition:
"
an instinctus naturae—a divine natural instinct present in every human being—capable of providing moral inclination, thanks to the natural law implanted by God in men’s souls" (Ojakangas
2013, p. 53)
This intuitive moral judgment is a kind of ‘instinctual’ snap response to a given matter and is for that reason rather unsophisticated, unstructured and often unclear in nature.
Conscience is thus, for the Catholic, a capacity to pass moral judgements which rely
a priori on an intuitive apprehension of moral 'first principles', followed by a deliberation on how this universal moral truth is to be applied in a given contingent situation, to produce a moral verdict known as
conscientia.
When it comes to abortion, the Catholic understanding would be that moral 'intuition' (
synderesis) naturally inclines the human mind to 'intuit' two truths: the first being that
each and every human life has inherent dignity and the second that
every human being should have 'bodily autonomy' or the power alone to make choices about their own bodies without facing coercion or violence from others.
At the 'deliberative' stage, the 'snap' instinctual response does not help us to ascertain whether or not the fetus in the womb is yet a person or at what stage (zygote, first-second-third trimester etc.) it should be recognised as having the inherent dignity of a human being.
There was a long-standing debate in the early and medieval church, (between those espousing an Aristotelian and Pythagorean natural philosophy, respectively), over whether or not an unformed foetus should actually be considered "
ensouled".
A number of church fathers, popes and theologians - such as St. Augustine of Hippo, the Apostolic Constitutions of the 4th century, Pope Innocent III, Gregory IX and St. Thomas Aquinas - argued that for a number of weeks post-conception, the foetus wasn't a person and so, while abortion of pre-ensouled foetuses was overwhelmingly viewed as still being a sinful or undesirable practice, it could not be equated with murder until the foetus "
quickened" in the womb and became formed; such that excommunications or equivalent ecclesiastical sanctions were for a long time only issued forth against women and male physicians who aborted '
formed' foetuses after their wombs had quickened, rather than early terminations of unformed foetal tissue.
Even today though, the Church does not teach that we can be sure that the embryo is animated at the point of conception. The stance actually goes that probabilism may not be used where human life
may be at stake, thus the 1992
Catholic Catechism notes that the embryo must be treated from conception "
tamquam, "as if" a human person". That's an important qualifier. It further states that: "
the church has not determined officially when human life [i.e. personhood] actually begins" and respect for life at all stages, even potential life, is generally the context of
church documents.
If a Catholic has earnestly tried to form their conscience according to the church's moral doctrine on abortion but remains unable to accept the premise for justifiable reasons, then that is their own prerogative to follow what their conscience is telling them and I certainly don't think anyone can 'judge' them, so long as they don't try to portray their own personal stance as being in line with the doctrine of the Church, when it isn't. As Vatican II teaches: “
Conscience frequently errs from invincible ignorance without losing its dignity. The same cannot be said when someone cares but little for truth and goodness, and conscience by degrees grows practically sightless as a result of a practice of sinning”.
I think it is possible for a good Catholic in good faith to act contrary to the teachings of the church. The church may see them as having an 'erring' conscience but one is still morally obliged to follow (from the church's doctrinal stance) a sincerely 'erring' conscience because conscience is always binding:
https://static1.squarespace.com/sta...s+on+Freedom+of+Conscience+-+Blind+Review.pdf
“A correct conscience and a false conscience bind in different ways,” Aquinas says.17 “The correct conscience binds absolutely and for an intrinsic reason; the false binds in a qualified way and for an extrinsic reason.”
A correct conscience binds without caveat and in every circumstance. It cannot be set aside without evil because it is correct in both the primary and secondary premise.
When a person has an erring conscience, insofar as the person thinks his conscience is correct, he is morally obligated to follow it. While a person has an erring conscience, he will not be aware of the error and he is still bound to follow what he thinks is right.
Violating an erring conscience is equivalent to intentionally doing evil, acting contrary to 18 the moral law he thinks he knows.
Aquinas says that the conscience is always binding and people must always follow their conscience in order to do what is right, thus affirming the necessity of freedom of conscience in society.