A (predicate) logical expression and its meaning?

Predicate Logic – Definition A predicate is an expression of one or more variables determined on some specific domain. A predicate with variables can be made a proposition by either authorizing a value to the variable or by quantifying the variable.

What is predicate logic example?

It is denoted by the symbol ∀. ∀xP(x) is read as for every value of x, P(x) is true. Example − “Man is mortal” can be transformed into the propositional form ∀xP(x) where P(x) is the predicate which denotes x is mortal and the universe of discourse is all men.

What is a predicate expression?

A predicate is an expression that evaluates to a Boolean. A predicate expression consists of operators or keywords that specify a relationship between two expressions. A predicate expression, when evaluated, returns either TRUE or FALSE. Think of a predicate expression as an equation.

What does predicate mean in logic?

In logic, a predicate is a symbol which represents a property or a relation. For instance, in the first order formula , the symbol is a predicate which applies to the individual constant . Similarly, in the formula , is a predicate which applies to the individual constants and .

What is an example of a predicate?

: the part of a sentence or clause that tells what is said about the subject “Rang” in “the doorbell rang” is the predicate. : completing the meaning of a linking verb “Sweet” in “the sugar is sweet” is a predicate adjective.

How do you solve a predicate logic?

And this is the proposition or predicate X is even another example with the a two-place predicate G X Y which could mean something like X is greater than Y and these are variables.

Why is predicate logic Important?

Predicate logic allows us to talk about variables (pronouns). The value for the pronoun is some individual in the domain of universe that is contextually determined.

What are the three types of predicate?

There are three types of predicates:

  • Simple predicate.
  • Compound predicate.
  • Complete predicate.

What is a subject and a predicate examples?

Subject and Predicate

The complete subject tells whom or what the sentence is about. For example; The house, The red car, or The great teacher. The complete predicate tells what the subject is or does. For example; (The house) is white, (The red car) is fast, or (The great teacher) likes students.

What are some examples of subject and predicate?


  • The sun (subject) / was shining brightly (predicate).
  • The dogs (subject) / were barking loudly (predicate).
  • The pretty girl (subject) / was wearing a blue frock (predicate).
  • My younger brother (subject) / serves in the army (predicate).
  • The man and his wife (subject) / were working in their garden (predicate).