Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Variables and Quantifiers for First-order models -artificial intelligence:
So what do sentences containing variables mean? In other words, how does first order model select whether such a sentence is false ortrue? The first step is to ensure that the sentence does not contain any unrestricted variables, variables which are not bound by (associated with) a quantifier. Firmly speaking, a first-order expression is not a sentence unless all the variables are bound. However, we typically assume that if a variable is not explicitly bound then actually it is implicitly commonly quantified.
Next we look for the outermost quantifier in our sentence. If it is X then we consider the truth of the sentence for each value X could take. When the outermost quantifier is X we have to search only a single possible value of X. To make it more formal we may use a concept of substitution. Here {X\t} is a substitution that replaces all occurrences of variable X with a term representing an object t:
Repeating this for all the quantifiers we get a set of ground formulae which we have to check to see if the original sentence is true or false. Unluckily, we haven't specificed that our domain Δ is finite for an example, it may contain the natural numbers - so there may be a infinite number of sentences to check for a given model! There may be also be an infinite number of models .So even though we have a right definition of model, and so a proper semantics for first-order logic, so we cannot rely on having a finite number of models as we did when drawing propositional truth tables.
Define formal language grammar? A formal language grammar is a set of formation rules which describe that strings made by the alphabet of a formal language are syntactically va
Q: Challenges and Prospects in Changing Information Technology? There is no doubt that information technology has made significant progress during the past two decades. Modern
Where Virtual memory is used ? Ans. Virtual memory is utilized in all main commercial operating systems.
Q. Convert the following decimal numbers into 9s & 10s complement: 1) 3654 2) 99 3) 18.293 Q. Convert the following binary numbers into 1s& 2s complement: 1) 1101
Write short note of SGML
How branching takes place in Instruction pipeline. Explain with suitable examples
Game Playing: We have now dispensed with the necessary background material for AI problem solving techniques, and we just considered to looking at particular types of problems
What is e-brokerage? E-brokerage is an investment house that permits you to buy and sell stocks and get investment information from its Web site.
Consider a collection class that is similar to the ArrayList class, except that elements are sorted in a certain order. We will call this class SortedArrayList. This c
CGI stands for Common Gateway Interface, and is a mechanism by which a browser is permitted to communicate with programs running on a server. If you look at every word in turn it m
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd