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Logical connectives can be used to link zero or more statements, so one can speak about n-ary logical connectives. The boolean constants True and False can be thought of as zero-ary operators. Negation is a unary connective, and so on.
Prior gave lectures on the topic at the University of Oxford in 1955–6, and in 1957 published a book, Time and Modality, in which he introduced a propositional modal logic with two temporal connectives (modal operators), F and P, corresponding to "sometime in the future" and "sometime in the past". In this early work, Prior considered time to ...
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English: The sixteen logical connectives ordered in a Hasse diagram. They are represented by: logical formulas; the 16 elements of V 4 = P^4() Venn diagrams; The nodes are connected like the vertices of a 4 dimensional cube. The light blue edges form a rhombic dodecahedron - the convex hull of the tesseract's vertex-first shadow in 3 dimensions.
A discourse marker is a word or a phrase that plays a role in managing the flow and structure of discourse.Since their main function is at the level of discourse (sequences of utterances) rather than at the level of utterances or sentences, discourse markers are relatively syntax-independent and usually do not change the truth conditional meaning of the sentence. [1]
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Since the most common logical connectives are either unary or binary, it is hardly necessary to get into n-ary connectives in the lede. "Commonly used connectives include the binary connectives conjunction (and), disjunction (or), implication, and biconditional, the unary connective negation (not), and the nullary connectives truth and falsity."