[quote:8jhnnjyy]So unnessary (doesn’t affect your salvation) beliefs can be proclaimed as dogma, right?[/quote:8jhnnjyy]Seems a rather Protestant way of defining necessary. How necessary is it to believe a truth given us by God?

Mary’s Immaculate Conception is truth. Furthermore, it is revealed truth because human reasoning alone cannot arrive at it as a necessary conclusion. Finally, it is formally defined truth promulgated by the Pope.

This means God did it, God told us He did it, and God assured us He did it.