B: How do you know you have the truth when it comes to any moral problem?
D: Because I follow what the Church says.
B: But how do you know if the Church has the right answer?
D: Because the Church says it’s true.
Now I’m sure that you recognise that as a circular answer. It is therefore and consequently invalid.
So to discover if the Church is correct on any matter, you must investigate the evidence that applies in that particular case and listen to any and all arguments that are put forward for and against before making a decision.
Don’t you find it odd that all Catholics, on all moral matters, using all available evidence and listening to all available arguments, always agree with what the church says?
Now you could argue that it is not surprising because the Church is always right. Which , for the purpose of the next point we will accept. But it seems that any Catholic investigating any moral problem, using all evidence and listening to all arguments other than those given by the church (see the previous point about circular arguments) will always get the correct answer.
So you are either right in all cases when determining moral actions, in which case all I need do is ask you when I need advice, or you are not, in which case you are in opposition to your church.
Which is it?