My opinion matters not. I'm not a scholar on the subject. What I have done on this thread is to point out alternative interpretations from scholars and to question your certainty about it and the conclusions out and others reach based on this certainty.
Just to answer my question to Sassy in #62:
I've checked the Hebrew, and it's not "will conceive" (Strongs 2029 - verb) but "is pregnant" (Strongs 3030, adjective).
So it's not talking about a virgin who will conceive, which wouldn't be a sign, but a virgin who is pregnant.