Propositional versions of resolution, Computer Engineering

Assignment Help:

Propositional versions of resolution:

Just because of so far we've only looked at propositional versions of resolution. However in first-order logic we require to also deal with such variables and quantifiers. And need to worry just about quantifiers: that we are going to be working with sentences like only contain free variables. So that recall that we treat these variables as implicitly universally quantified so by that they can take any value. Moreover this allows us to state a more generally first-order binary resolution inference rule as: 

A ? B,    ¬ C?  D

                              Subst(θ, B) = Subst(&theta, C)

Subst(θ, A ? D)

 

For such rule has the side condition Subst(θ, B) = Subst(&theta, C), that uses there to be a substitution θ that makes B and C the same just before we can apply the rule. Notice there θ can substitute fresh variables when making B and C equal. But there it doesn't have to be a ground substitution! Like if we can find such a θ and we can make the resolution step and apply θ to the outcome. In generally we say that the first-order binary rule is simply equivalent to applying the substitution to the original sentences, and then applying the propositional binary rule.


Related Discussions:- Propositional versions of resolution

Show data representation for computation, Binary codes exist for any fundam...

Binary codes exist for any fundamental representation. Binary codes can be created for any set of discrete elements for example colors, spectrum, musical notes, chessboard position

Explain message, Differentiate between message switching, packet switching ...

Differentiate between message switching, packet switching and circuit switching Message switching: Recourse computer sends data to switching office that stores the data in

Show network topology in digital system, Q. Show Network Topology in digita...

Q. Show Network Topology in digital system? This deals with the geometrical arrangement of nodes (endpoints consisting of physical devices such as terminals, printers, PCs, and

What is the draw back of micro programmed control, What is the draw back of...

What is the draw back of micro programmed control? It leads to a slower operating speed because of the time it takes to fetch microinstructions from the control store.

Convert the following decimal numbers into octal, Q. Convert the following ...

Q. Convert the following DECIMAL numbers into OCTAL, double check by converting the result OCTAL to DECIMAL. a) 932 b) 4429.625 c) 19

Find out data changing from special code to temporal code, Data can be chan...

Data can be changed from special code to temporal code by using ? Ans. By using Shift Registers data can be changed from special code to temporal code. A Register wherein data ge

Illustrate the working of encoders, Q. Illustrate the working of Encoders? ...

Q. Illustrate the working of Encoders? An Encoder performs reverse function of decoder. An encoder has 2n input lines and 'n' output line. Let's see 8 ×3 encoder that encodes 8

Iot, what is ardiuno explain its working

what is ardiuno explain its working

State the advantages of bespoke software, State the advantages of Bespoke ...

State the advantages of Bespoke Software -  specifically designed for application and hence more efficient and will only contain the features wanted; as it will be devoid of

What is remote login, Remote Login  A login that permits a user termina...

Remote Login  A login that permits a user terminal to connect to a host computer by a network or direct telecommunications link, and to interact with that host computer as if t

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