I would say: "How's that related to my question ?" Please answer for both formal and informal cases
-
Is it relevant that the first utterance should be a question, and the second an answer (albeit not "recognised" as an answer by the first speaker)? I'm specifically asking that because a non-sequitur doesn't normally have any implications of "not an answer to the question just asked" - it just means "not meaningfully connected to preceding utterances" (usually, within the context of a conversation, not an interrogation).– FumbleFingersDec 22, 2020 at 17:31
-
(1) Non/germane / Off-topic / Going off at a tangent / Digress / a non-sequitur (2) Sidetrack– Edwin AshworthDec 22, 2020 at 17:31
-
Does this answer your question? Formal expression for "talking about something unrelated" (one answer has a list graded from informal to formal).– Edwin AshworthDec 22, 2020 at 17:32
-
The usual answer when that happens is "Why do you say that?"– John LawlerDec 22, 2020 at 17:33
-
1Also What do you call a response which does not address the question? - which going by the title should be a pretty good match!– FumbleFingersDec 22, 2020 at 17:34