Associativity of connectives - artificial intelligence, Computer Engineering

Assignment Help:

Associativity of Connectives:

In order to tell us brackets are useful when to perform calculations in arithmetic and when to evaluate the truth of sentences in logic. Imagine we want to add 10, 7 and 5. We could do this: (10 + 7) + 5 = 22. Alternatively, we could do this: 10 + (7 + 5) = 22. We, in this case, can alter the bracketing and the answer still comes out the same. We say that addition is associative because it fulfills this property with respect to bracketing.

The ∧ and  connectives are associative. This can be true, because the order in which we examine truth values does not matter when we are working with sentences only involving or only involving . For example, assume we wanted to know the truth of P ∧ (Q ∧ R). To do this, we just have to examine that every proposition is true, in which case the complete sentence will be true, or else the entire sentence will be false. Due to this reason, it does not matter how the brackets are arranged, and hence the ∧ is associative.

Similarly, assume we wanted to work out the truth of:

(P  Q)  (R (X Z))

Then all we have to do is examine whether 1 of these propositions is true, and the bracketing is beside the point. As equivalences, the 2 associativity results are then:

(P ∧ Q) ∧ R = P ∧ (Q ∧ R)

(P ∨ Q) ∨ R = P ∨ (Q ∨ R)

 


Related Discussions:- Associativity of connectives - artificial intelligence

Explain the term - strong typing and weak typing, Explain the term - Strong...

Explain the term - Strong Typing and  Weak Typing Strong Typing : When any operation upon an object can be checked during compile time, when type is confirmed forcefully.

C++, program to find area under the curve y=f(x) between x=a and y=b , inte...

program to find area under the curve y=f(x) between x=a and y=b , integrate y=f(x)between limits of a and b

Perform on occurrence of an interrupt, Q. Perform on occurrence of an inter...

Q. Perform on occurrence of an interrupt? Determining these requirements let's work out steps that CPU should perform on occurrence of an interrupt. The CPU should find

Learning weights in perceptrons, Learning Weights in Perceptrons: Furt...

Learning Weights in Perceptrons: Furthermore details are we will look at the learning method for weights in multi-layer networks next lecture. Thus the following description o

Explain control word, What is control word? A control word is a word wh...

What is control word? A control word is a word whose individual bits show the various control signals.

Explain data mining, Data Mining is an analytic method designed to explore...

Data Mining is an analytic method designed to explore data and then to validate the findings by applying the detected patterns to latest subsets of data.  The ultimate goal of dat

Assembly language programes, Program to calculate the value of the series 1...

Program to calculate the value of the series 1+x+x2+x3+.... +xn. Read the values of ''x'' and ''n'' from the keyboard.

What is ram parity, RAM parity checking is the storing of a redundant parit...

RAM parity checking is the storing of a redundant parity bit showing the parity odd or even of a small amount of computer data typically one byte stored in random access memory, an

Compact disc - computer storage, Compact Disc; Compact Disc ( CD)   i...

Compact Disc; Compact Disc ( CD)   is an optical disc  which is used to  store digital data. It was initially developed to store sound recordings completely, but later it als

What is process control block, What is process control block?  Each pro...

What is process control block?  Each process is shown in the OS by a process control block. It having many pieces of information associated with a specific process.

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