It is neither a fallacy nor a contradiction, you completely misunderstood the point. What I am saying is precisely that you can defined those however you see fi

It is neither a fallacy nor a contradiction, you completely misunderstood the point. What I am saying is precisely that you can defined those however you see fit and your definitions don’t even need to match the other person’s for a consensus. To pull it to an extreme of simplicity, we can all agree that good things are good and bad things are bad without having to agree on which specific things are which.