It's my second language. Is it not correct to call a half-brother your brother in English?
I seems very odd to say it is not a brother at all? Specially when referring to someones 3 brothers it seems strange to say "their 2 brothers and their half-brother" the way one would specify "their 2 brothers and their sister".
The dictionary says a brother needs one parent in common.
Therefore I'm right and everyone else is wrong. (the jokes on you everyone else!) The LLM's are just more wrong which is just a different kind of wrong.
I seems very odd to say it is not a brother at all? Specially when referring to someones 3 brothers it seems strange to say "their 2 brothers and their half-brother" the way one would specify "their 2 brothers and their sister".