I'm going to expand on my question above.No, but what I'm saying is both of us might be arguing out of silence.
How about this. Do you believe Simon (Peter) and Andrew were blood brothers?
From Scripture I'm sure most, if not all, understand that Peter and Andrew were brothers from the same father. Scripture says as much about Peter and Andrew's relationship to their father as it does about James, Joses, Jude, and Simon's relationship to Jesus. So then, how is it that some will deny that Jesus had brothers and sisters from the same father while they will agree that Peter had a brother by the same father. This also applies to John and James.
How do the Scriptures reveal the difference between Jesus and His brothers and sisters vs Peter and John and their brothers?