First-Order Inference Rules:

Here now we have a clear definition of a first-order model is that we can define soundness for first-order inference rules in the same way such we did for propositional inference rules: in fact the rule is sound if given a model of the sentences above the line that is always a model of the sentence below. 

Justify here to be able for new rules if we must use the notion of substitution than we've already seen substitutions that replace propositions into propositional expressions see in the 7.2 above this and other substitutions that replace variables with terms that represent a given object in the 7.5 above. However in this section we use substitutions that replace variables with ground terms without variables- so to be clearly we will call these ground substitutions. And the another name for a ground substitution is an instantiation, if we considered here example than we see, start with the wonderfully optimistic sentence such everyone likes everyone else:  ∀X, Y (likes(X, Y)), means here we can choose particular values for X and Y. But if we can instantiate this sentence to say: as george, tony. It means that we have chosen a particular value that is the quantification no longer makes sense so that we must drop it.

Posted Date: 1/11/2013 6:00:25 AM | Location : United States

Ask an Expert

Related Discussions:- First-order inference rules, Assignment Help, Ask Question on First-order inference rules, Get Answer, Expert's Help, First-order inference rules Discussions

Write discussion on First-order inference rules
Your posts are moderated

Write your message here..

Related Questions

Which device converts BCD to seven segment, A device which converts BCD to ... A device which converts BCD to Seven Segment is called ? Ans. DECODER is a device that converts BCD to Seven Segment. This coverts binary words in alphanumeric characters.

Sequential circuit, can u do it in 13 hours ? can u do it in 13 hours ?

Explain e-brokerage, E-brokerage. An e-brokerage is an investment house... E-brokerage. An e-brokerage is an investment house that permits you to buy and sell stocks and get investment information from its Web site.

Concept of pipelining, Describe the concept of pipelining. Ans: Pipeli... Describe the concept of pipelining. Ans: Pipelining is the means of executing machine instructions concurrently. This is the effective way of organizing concurrent activity in

What is parallel balance point, Q. What is Parallel Balance Point? In ... Q. What is Parallel Balance Point? In order to execute parallel algorithm on parallel computer K processors are necessary. It should be noted that given input is allocated to

Host computer-array processing, Host Computer:  An array processor may be a... Host Computer:  An array processor may be attached to a host computer by the control unit. The reason of the host computer is to broadcast a sequence of vector instructions by CU t

Explain about decimal numbers, Q. Explain about Decimal Numbers? Deci... Q. Explain about Decimal Numbers? Decimal number system has 10 digits signified by 0,1,2,3,4,5,6,7,8 and 9. Any decimal number can be signified as a string of these digits an

Explain passing parameters using pointers, Q. Explain Passing Parameters Us... Q. Explain Passing Parameters Using Pointers ? This method overcomes the drawback of using variable names directly in procedure. It uses registers to pass procedure pointers to

Form an 8 bit adder using 2 four bit adder IC's 7483, How will you form an ... How will you form an 8 bit adder using 2 four bit adder IC's 7483? Ans: 4 bit adder IC is IC 7483. This has two four bit data inputs and output carry, 4 bit data output carr

When can we see layer groups in gimp, Sometimes it is nice to place layers ... Sometimes it is nice to place layers in groups. It makes them simple to organize when you have lots of them. It also means you can simply apply the similar effect to lots of layers