Only use a comma after "but" if it is followed by an "interrupter"—a non-essential phrase like "of course" or "in my opinion" [6, 10].
However , Nevertheless , Nonetheless , Notwithstanding . Casual: Though (at the end of a sentence), Still , Yet . Contrastive: In contrast , On the other hand , Conversely . 3. Usage as "Except"
Many were taught in school that this is a "sin." However, linguists and style guides generally agree it is perfectly acceptable for emphasis or to create a sharper contrast [4, 23]. The Comma Rule:
If your interest is linguistic, "but" is one of the most debated words in English composition.
Developers often post about the "but then it works anyway" phenomenon, where deployment stages throw errors but still successfully go live [32].