Atheists, tell me, a Roman Catholic: why should I become an atheist?

[Catholic_Lady]

help me understand how to determine a statement to be infallible

If its a) in the bible, b) uttered by the pope or c) uttered by a church council that the pope says is correct. 

Incorrect.

---

No one can know for sure, but we believe since the baby is an innocent child he is with God. As for the moms who have abortions, I'm sure it depends on a lot and is taken on a case by case basis, just like with everyone/everything else.

You are SURE? or you HOPE?

But if all those babies are in heaven, god must purchase a lot of pampers

Personally I feel very sure about that. But the Church cannot officially declare with certainty who is in Hell or Heaven (with the exception of canonized saints). But it is the general consensus among Catholics that unborn babies are with God.

---

[quote pid='1461452' dateline='1480722306']

Then the Church are teaching the Bible wrong. Because the Bible most certainly does teach that.

The teachings of the Church are expressed in official Church doctrines, such as the Catechism. As for the bible, it just depends on which part you read and/or how you interpret it. But that is why the authority of the Church takes precedence over the bible.

So you're saying the church believes the bible or at least parts of it, to be wrong.
[/quote]

I would not say "wrong" is necessarily the right word. But we do recognize that it is not infallible Church Doctrine. It was written thousands of years ago and can be interpreted many different ways, and for that reason can't be considered "fool proof".