How do you know someone is smart?
This Upworthy article summarizes responses to a Reddit AskReddit thread in which people listed 18 subtle signs someone is really smart. It opens by recalling [[Albert Einstein]] and the well-known Dunning–Kruger effect, noting how people often misjudge their own intellect and how social perception can nonetheless be fairly accurate. Drawing on answers from [[Reddit]] users on [[AskReddit]], the piece highlights patterns such as curiosity, a love of learning, intellectual humility, the ability to explain complex ideas simply, asking great questions, using analogies, adapting communication to the audience, and changing one’s mind with new evidence. It also references online culture (e.g., [[Facebook]]) and frames the list as practical cues readers can watch for when evaluating others’ intelligence. The examples come from everyday observations rather than academic tests, making them approachable and useful.