I understand your reasoning, but I have a different opinion.
C2Directly acknowledges understanding before stating a contrasting opinion.
We may have to leave it there.
C2Subtly suggests the discussion has reached an impasse.
Perhaps we're approaching this from different angles.
C2Suggests a difference in perspective without directly stating disagreement.
It seems we have irreconcilable differences of opinion.
C2A formal way of stating that agreement is impossible.