argument
Simply an explanation of a different possible viewpoint,
or of what the reason for a different decision,
or what the other side of the coin, or the case presented at a debate, might be;
Such as: What is the argument against equal pay? Or for not taking the job offered?
Angry encounter with potentially strongly emotional or volatile disagreement,
which often includes personal/critical negative wordings, and a shouting match, amongst people who don't like each other or do not accept the other's actions, mannerisms, life choices, etc
(though it might be an emotional airing and sharing of difficult feelings and decisions)
B