# What are Predicators in science?

## What are Predicators in science?

Examples and Observations “The predicator is the central syntactic element in a sentence. This is the case because it is the predicator which determines the number of complements that will occur and, indeed, whether a particular element is a complement or an adjunct.”

**What is a predicate argument structure?**

A predicate-argument (P-A) structure is a rela- tionship between a verbal expression and its ar- guments, such as the subject, the direct object, and the indirect object.

**Is first order logic decidable?**

First-order logic is not decidable in general; in particular, the set of logical validities in any signature that includes equality and at least one other predicate with two or more arguments is not decidable. Logical systems extending first-order logic, such as second-order logic and type theory, are also undecidable.

### Why is fol Undecidable?

First order logic is undecidable, which means (again, I think) that given a set of sentences A and a sentence B, there is no procedure for determining whether A implies B (i.e. it’s not the case that A are true and B is false) in all interpretations. So FOL is decidable.

**What is decidable and undecidable problems?**

A problem is said to be Decidable if we can always construct a corresponding algorithm that can answer the problem correctly. It is also important to know that these problems are termed as Turing Decidable since a Turing machine always halts on every input, accepting or rejecting it.

**What does Decidable mean?**

capable of being decided

## Is Decidable a word?

adjective. capable of being decided. Logic.

**Is the halting problem semi-Decidable?**

A language is said to be Semi-decidable if there exists a Turing machine which halts if a word belongs to the language (YES cases) and may reject or go into infinite loop if the word doesn’t belong to the language (NO case). …

**What does it mean for a problem to be decidable?**

(definition) Definition: A decision problem that can be solved by an algorithm that halts on all inputs in a finite number of steps. The associated language is called a decidable language. Also known as totally decidable problem, algorithmically solvable, recursively solvable.