Sic et Non, an early scholastic text whose title translates from Medieval Latin as "Yes and No", was written by Pierre Abélard. In the work, Abélard juxtaposes apparently contradictory quotations from the Church Fathers on many of the traditional topics of Christian theology. In the Prologue, Abélard outlines rules for reconciling these contradictions, the most important of which is noting the multiple significations of a single word. However, Abélard does not himself apply these rules in the body of the Sic et non, which has led scholars to conclude that the work was meant as an exercise book for students in applying dialectic (logic) to theology.

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Yes and No is a spoken word game similar to Twenty Questions played in Charles Dickens' A Christmas Carol. In the game, the host (Fred in A Christmas Carol) has something in mind, and the guessers (party guests) ask several simple yes-or-no questions. In A Christmas Carol, Scrooge is the object, as seen in the section below:

It was a Game called Yes and No, where Scrooge's nephew had to think of something, and the rest must find out what; he only answering to their questions yes or no, as the case was. The brisk fire of questioning to which he was exposed, elicited from him that he was thinking of an animal, a live animal, rather a disagreeable animal, a savage animal, an animal that growled and grunted sometimes, and talked sometimes, and lived in London, and walked about the streets, and wasn't made a show of, and wasn't led by anybody, and didn't live in a menagerie, and was never killed in a market, and was not a horse, or an ass, or a cow, or a bull, or a tiger, or a dog, or a pig, or a cat, or a bear. At every fresh question that was put to him, this nephew burst into a fresh roar of laughter; and was so inexpressibly tickled, that he was obliged to get up off the sofa and stamp. At last the plump sister, falling into a similar state, cried out:
"I have found it out! I know what it is, Fred! I know what it is!"

Yes and no are two words for expressing affirmatives and negatives respectively in English ("Are you hungry?" "Yes, I am."). Early Middle English had a four-form system, but Modern English has reduced this to a two-form system consisting of yes and no. Some languages do not answer yes-no questions with single words meaning 'yes' or 'no'. At least one, Welsh, is widely but erroneously believed to have no words for yes and no. In fact it has, these being but one of the many ways in which yes-no questions are answered in Welsh. Welsh and Finnish are among several languages that employ echo answers rather than words for yes and no in such circumstances. Other languages have systems named two-form, three-form, and four-form systems, depending on how many words for yes and no they employ. Some languages, such as Latin, have no yes-no word systems.

Naïn ist eine im Neuen Testament der Bibel ausschließlich im Evangelium nach Lukas erwähnte Kleinstadt.

Nein ist die negative Antwort auf eine Frage, die man entweder positiv oder negativ beantworten kann. Dies nennt man eine Entscheidungsfrage. „Nein“ ist eine Interjektion (Vergleiche: „Ja“, „Vielleicht“). Eine Aussage zu verneinen wird sprachwissenschaftlich als Negation bezeichnet. Die untenstehenden Beispiele verdeutlichen, dass der Gehalt des Wortes je nach Kontext modal aufgeladen wird und dass die syntaktische Funktion die eines Satzäquivalentes annimmt.

Personnage de la bande dessinée Grand Vampire de Joann Sfar. Elle apparaît dans le tome 5 de la série, La Communauté des magiciens.

No:

• No to symbol chemiczny pierwiastka Nobel
• No, jezioro w Sudanie
• No to w gminie Ringkøbing
• Nō, jeden z głównych gatunków dramatu japońskiego
• kod ISO języka norweskiego
• の (no), jedna z liter/sylab w japońskim piśmie kana