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Chapter 1: Q13E (page 23)

What Boolean search would you use to look for Web pages about beaches in New Jersey? What if you wanted to find Web pages about beaches on the isle of Jersey (in the English Channel)?

Short Answer

Expert verified

The Boolean search would you use to look for Web pages about beaches in New Jersey are NEW and JERSEY, and BEACHES, JERSEY and BEACHES.

Step by step solution

01

Introduction to the Concept

A Boolean search is a query strategy that connects individual keywords or phrases within a single query using Boolean Logic.

02

Solution Explanation

Most online browsers enable Boolean search engine algorithms, which can aid in the discovery of web sites on specific topics. Using Boolean searching to find web pages regarding beaches in New Jersey, like in this inquiry.

We'd type NEW and JERSEY, and BEACHES.

We would now type JERSEY and BEACHES to find web pages about beaches on the Isle of Jersey (in the English Channel).

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Most popular questions from this chapter

Each inhabitant of a remote village always tells the truth or always lies. A villager will give only a “Yes” or a “No” response to a question a tourist asks. Suppose you are a tourist visiting this area and come to a fork in the road. One branch leads to the ruins you want to visit; the other branch leads deep into the jungle. A villager is standing at the fork in the road. What one question can you ask the villager to determine which branch to take?

A says “The two of us are both knights” and B says A “ is a knave.”

Show that ¬¬pand pare logically equivalent.

Are these system specifications consistent? “The system is in multiuser state if and only if it is operating normally. If the system is operating normally, the kernel is functioning. The kernel is not functioning or the system is in interrupt mode. If the system is not in multiuser state, then it is in interrupt mode. The system is not in interrupt mode.”

A says “We are both knaves” and B says nothing. Exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by Smullyan [Sm78]) who can either lie or tell the truth. You encounter three people, A, B, and C. You know one of these people is a knight, one is a knave, and one is a spy. Each of the three people knows the type of person each of other two is. For each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. When there is no unique solution, list all possible solutions or state that there are no solutions.

A says “I am the knight,” B says “A is telling the truth,” and C says “I am the spy.”
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