one-line fact; brief snippet of knowledge
Refers to a piece of information or trivia that can be expressed in a single line; often implies superficial or scanty knowledge.
His talk is always just one-line facts and lacks depth.
Show off a one-line fact picked up online.
豆知識 refers to a small, useful piece of trivia, often shared casually, while 一行知識 emphasizes the brevity and sometimes the superficiality of the information.
Compound of 一行 (one line) and 知識 (knowledge). The exact origin is uncertain, but it likely emerged in modern Japanese to describe superficial facts or trivia.