Predicate vs Relation - What's the difference?
predicate | relation |
(grammar) The part of the sentence (or clause) which states something about the subject or the object of the sentence.
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(logic) A term of a statement, where the statement may be true or false depending on whether the thing referred to by the values of the statement's variables has the property signified by that (predicative) term.
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(computing) An operator or function that returns either true or false.
To announce or assert publicly.
(logic) To state, assert.
To suppose, assume; to infer.
* 1859 , Charles Dickens, A Tale of Two Cities :
* 1881 , Thomas Hardy, A Laodicean :
(originally US) To base (on); to assert on the grounds of.
* 1978 , Michel Foucault, The Will to Knowledge , trans. Robert Hurley (Penguin 1998, page 81):
The manner in which two things may be associated.
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*:Carried somehow, somewhither, for some reason, on these surging floods, were these travelers, of errand not wholly obvious to their fellows, yet of such sort as to call into query alike the nature of their errand and their own relations . It is easily earned repetition to state that Josephine St. Auban's was a presence not to be concealed.
A member of one's family.
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The act of relating a story.
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A set of ordered tuples.
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*:Signs are, first of all, physical things: for example, chalk marks on a blackboard, pencil or ink marks on paper, sound waves produced in a human throat. According to Reichenbach, "What makes them signs is the intermediary position they occupy between an object and a sign user, i.e., a person." For a sign to be a sign, or to function as such, it is necessary that the person take account of the object it designates. Thus, anything in nature may or may not be a sign, depending on a person's attitude toward it. A physical thing is a sign when it appears as a substitute for, or representation of, the object for which it stands with respect to the sign user. The three-place relation' between sign, object, and sign user is called the ''sign '''relation''''' or '''''relation of denotation .
(lb) Specifically , a set of ordered pairs.
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(lb) A set of ordered tuples retrievable by a relational database; a table.
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(lb) A statement of equality of two products of generators, used in the presentation of a group.
The act of intercourse.
As nouns the difference between predicate and relation
is that predicate is the part of the sentence (or clause) which states something about the subject or the object of the sentence while relation is the manner in which two things may be associated.As a verb predicate
is to announce or assert publicly.predicate
English
(wikipedia predicate)Alternative forms
* (archaic)Etymology 1
From (etyl) predicat (French , as Etymology 2, below.Noun
(en noun)- In "The dog barked very loudly", the subject is "the dog" and the predicate is "barked very loudly".
- In the light of this observation, consider Number Agreement in a sentence like:
(120) They'' seem to me [S — to be ''fools''/?''a fool'']
Here, the Predicate''' Nominal ''fools'' agrees with the italicised NP ''they'', in spite of the fact that (as we argued earlier) the two are contained in different Clauses at S-structure. How can this be? Under the NP MOVEMENT analysis of ''seem'' structures, sentences like (120) pose no problem; if we suppose that ''they'' originates in the — position as the subordinate Clause Subject, then we can say that the '''Predicate Nominal agrees with the ''underlying'' Subject of its Clause. How does ''they get from its underlying position as subordinate Clause Subject to its superficial position as main Clause Subject? By NP MOVEMENT, of course!
- A nullary predicate''' is a proposition. Also, an instance of a ' predicate whose terms are all constant — e.g., P(2,3) — acts as a proposition.
- A predicate can be thought of as either a relation (between elements of the domain of discourse) or as a truth-valued function (of said elements).
- A predicate is either valid, satisfiable, or unsatisfiable.
- There are two ways of binding a predicate''''s variables: one is to assign constant values to those variables, the other is to quantify over those variables (using universal or existential quantifiers). If all of a '''predicate' s variables are bound, the resulting formula is a proposition.
- Thus, in (121) (a) persuade'' is clearly a ''three-place Predicate''''' — that is, a '''Predicate''' which takes three Arguments: the first of these Arguments is the Subject NP ''John'', the second is the Primary Object NP ''Mary'', and the third is the Secondary Object S-bar [''that she should resign'']. By contrast, ''believe'' in (121) (b) is clearly a ''two-place '''Predicate''''' (i.e. a '''Predicate which has two Arguments): its first Argument is the Subject NP ''John'', and its second Argument is the Object S-bar [''that Mary was innocent ].
Derived terms
* nominal predicative * predicatable * predicate calculus * predicative adjective * predicativelyEtymology 2
From (etyl) .Verb
(predicat)- There was a character about Madame Defarge, from which one might have predicated that she did not often make mistakes against herself in any of the reckonings over which she presided.
- Of anyone else it would have been said that she must be finding the afternoon rather dreary in the quaint halls not of her forefathers: but of Miss Power it was unsafe to predicate so surely.
- The law is what constitutes both desire and the lack on which it is predicated .
