Argued this one A LOT in high school (which was inhabited by religious nuts):
No woman who becomes pregnant by someone she oughtn't be pregnant by doesn't debate arguing immaculate conception, especially in the days where her punishment might have been stoning. I would suspect the father of Jesus (provided Jesus in fact existed) was some random dude who's name has been lost to time and Mary was a damn good liar.
Watch their heads explode.
No woman who becomes pregnant by someone she oughtn't be pregnant by doesn't debate arguing immaculate conception, especially in the days where her punishment might have been stoning. I would suspect the father of Jesus (provided Jesus in fact existed) was some random dude who's name has been lost to time and Mary was a damn good liar.
Watch their heads explode.