I'm still perplexed by this.
Catholicism's own apologists admit no scriptural support for this nor any support from the ECFs. These can be verified on the catholicencyclopediaonline.
It sounds like the catholic is working on a lot of "ifing" and "couldas". Something like this...."if Christ was sinless, couldn't God....".
To be honest God is capable of doing what He wills. However, He doesn't contradict Himself or His Word.
The evidence we do have in the Word completely goes against the immaculate conception.
So again I ask....what is the catholic appealing to?
Teaching learned in childhood?
They've always done it this way and it's hard to break the "habit"? (no pun there)
no it doesn't