Evidently it doesn't know the difference between a nephew and a brother, though, because Abraham calls Lot his "brother" in the Genesis of the Greek Septuagint just like he does in the Hebrew ... but we later find out that Lot is really his brother's son.
And it evidently doesn't know the difference between "brother" and "half-brother," because the Gospels call Philip the Tetrarch Herod's "brother," while secular history records that he was really Herod's half-brother.
And since it doesn't know the difference between brother and half-brother, how do you know that Jesus' "brothers" weren't children of Joseph's from an earlier marriage?*
I mean, until you find that elusive verse that calls them "sons of Mary". You are going to find that verse for us, aren't you?
(*In fact, the parentage of some of Jesus' "brothers" is identified in Scripture for us already. James the Less and Joses are identified as "brothers of the Lord" and their parentage is specified ... and they aren't sons of Mary and Joseph.)
Well I don't...And I also don't know if Mary preferred Pistaccio ice cream over Rocky Road...
Is that really your argument???