No.
Indeed, the shortest sentence in the world. Agree or disagree?
A two-letter, one-syllable word that in itself is a sentence. How could that be right if it is arguably wrong?
In linguistics, a sentence is a grammatical unit of one or more words, bearing minimal syntactic relation to the words that precede or follow it, often preceded and followed in speech by pauses, having one of a small number of characteristic intonation patterns, and typically expressing an independent statement, question, request, command, etc. A simple complete sentence consists of a subject and a predicate. Grammatically speaking, it loses the subject-predicate agreement that we usually look for in completing the thought to consider it a sentence.
To further lengthen my stand: the meaning of the term sentence may be expanded to include elliptical material and nonproductive items. An elliptical construction is a construction that lacks an element that is recoverable or inferable from the context. Take the following words: "Hello." "Yes." "Tonight." (in response to "When are you leaving?" Let's say, "Nod if agree." In the said construction, 'you' is understood, as in "Nod if you agree."
It is the context of making a decision that a NO is considered a sentence; in response to a preceding statement of a communicator.
