non sequitur

1. N-VAR A non sequitur is a statement, remark, or conclusion that does not follow naturally or logically from what has just been said. 不郃邏輯的推論[正式]

Had she missed something important, or was this just a non sequitur?

她是漏掉了什麼重要的東西，還是瞎猜呢？