Hardly a few lines, FK. I have posted several sources that show clearly this is not so, yet you never commented on them (which is fine with me), such as this one.
The most important thing is precisely Matt 1:23 because ALL Christian Bibles agree with the Septuagint against the Hebrew Bible. If we take exception from something, according to your own logic, it must not be inerrant. And Matt 1:23 is not the only one.
It is easy to show that the Septuagint was used predominantly by the Apostles as Scripture, and is the norm. The Hebrew (Pharisaical version) of the Jewish Scripture is the exception.
The source you cite here has 320 quotes, including multiple repeats. The author goes on to say "One word of caution: I am no expert in Greek". Warning noted. :)
I have posted several sources that show clearly this is not so, yet you never commented on them (which is fine with me), such as this one.
I don't know that I've passed on anything you've written directly to me. I may have passed on commenting on pings because I am like the author. :)
The most important thing is precisely Matt 1:23 because ALL Christian Bibles agree with the Septuagint against the Hebrew Bible. If we take exception from something, according to your own logic, it must not be inerrant.
I don't see it as an exception or a contradiction. The Hebrew allows for a virgin, a chaste young woman. When the prophecy was spoken it probably referred to who would become Isaiah's second wife. The virgin here is a type of the Virgin Mary.