Propositional truth tables, Computer Engineering

Assignment Help:

Propositional truth tables:

There {X\t} is a substitution that replaces all occurances of variable X with a term representing an object t as: 

  • ∀X. A is true if and only if A.{X\t} for every one t in Δ
  • ?X. A is true if and only if A.{X\t} for at any rate one t in Δ

 

By repeating this for all the quantifiers than we get a set of ground formulae in which we have to check that if the original sentence is true or false. But unfortunately, we don't have specified there that our domain Δ is finite -  like in example we see that it may contain the natural numbers -  but there may be a infinite number of sentences to check for a given model! So there may be also be an infinite number of models. And although we have a proper definition of model hence a proper semantics for first-order logic and we can't rely on having a finite number of models like we did where drawing propositional truth tables.


Related Discussions:- Propositional truth tables

What is a disk drive, What is a disk drive? The electro mechanical mech...

What is a disk drive? The electro mechanical mechanism that spins the disk and moves the read/write heads known as disk drive.

Prove, state and prove distributive law?

state and prove distributive law?

How do you classify the neutrons, Q. How do you classify the neutrons in te...

Q. How do you classify the neutrons in terms of its kinetic energy? Neutrons are classified as-per to their kinetic energy as (a) Slow neutrons as well as (b) fast neutrons.

What is blocking probability, What is blocking probability? Blocking ...

What is blocking probability? Blocking Probability: The blocking probability P is described as the probability like all the servers in system are busy. If all the servers ar

Extension of propositional logic, Extension of propositional logic: Aw...

Extension of propositional logic: Away from proving  theorems directly, and the other main use for rewrite rules is to prepare a statement just for use before we search for th

Decoder, how to make a dec oder

how to make a dec oder

Secondary storage - computer architecture, Secondary storage: Secondar...

Secondary storage: Secondary storage (or external memory) differs from primary storage in that aspect it is not accessible by the CPU directly. The computer typically uses its

Search mechanisms in prolog - artificial intelligence, Search mechanisms in...

Search mechanisms in Prolog We can utilize this simple Prolog program to describe how Prolog searches: president(X) :- first_name(X, georgedubya), second_name(X, bush). p

Chemistry, application problems on electrochemical series

application problems on electrochemical series

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd