once my student used the term but although, I corrected her and asked her to use 'although' instead. He insisted he had seen this word before.
I looked up and found we actually have this word. Is it common? Can we use these two words together? I found some examples from new york times and Guardian. Probably in Ame English?
Guardian: But although I understand their arguments, I disagree.
But although the city was outraged, the murder went unsolved.