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Artificial Intelligence
 
CSCI-755: Artificial Intelligence – Group Project
Due: May 15, 2018 – end of day (11:59 pm)
You will turn in a paper with the following:
a. Cover page with the names and ids of the members of the group, class, and semester
(CSCI-755-M01 Spring 2018)
b. The knowledge base and chain of reasoning to solve the problem below.
c. Any other commentary to support your solution.
Your mission is to capture, in logical form, enough knowledge to answer a series of
questions about the following simple scenario:
Yesterday John went to the North Berkeley Safeway supermarket and bought two
pounds of tomatoes and a pound of ground beef.
Start by trying to represent the content of the sentence as a series of assertions. You
should write sentences that have straightforward logical structure (e.g., statements that
objects have certain properties, that objects are related in certain ways, that all objects
satisfying one property satisfy another). The following might help you get started:
? Which classes, objects, and relations would you need? What are their parents,
siblings and so on? (You will need events and temporal ordering, among other
things.)
? Where would they fit in a more general hierarchy?
? What are the constraints and interrelationships among them?
? How detailed must you be about each of the various concepts?
To answer the questions below, your knowledge base must include background
knowledge. You’ll have to deal with what kind of things are at a supermarket, what is
involved with purchasing the things one selects, what the purchases will be used for, and
so on. Try to make your representation as general as possible. To give a trivial example:
don’t say “People buy food from Safeway,” because that won’t help you with those who
shop at another supermarket. Also, don’t turn the questions into answers; for example,
question (c) asks “Did John buy any meat?”—not “Did John buy a pound of ground
beef?”
Sketch the chains of reasoning that would answer the questions. If possible, use a logical
reasoning system to demonstrate the sufficiency of your knowledge base. Many of the
things you write might be only approximately correct in reality, but don’t worry too
much; the idea is to extract the common sense that lets you answer these questions at
a

ll. A truly complete answer to this question is extremely difficult, probably beyond the
state of the art of current knowledge representation. But you should be able to put
together a consistent set of axioms for the limited questions posed here.
a. Is John a child or an adult? [Adult]
b. Does John now have at least two tomatoes? [Yes]
c. Did John buy any meat? [Yes]
d. If Mary was buying tomatoes at the same time as John, did he see her? [Yes]
e. Are the tomatoes made in the supermarket? [No]
f. What is John going to do with the tomatoes? [Eat them]
g. Does Safeway sell deodorant? [Yes]
h. Did John bring some money or a credit card to the supermarket? [Yes]
i. Does John have less money after going to the supermarket? [Yes]
Make the necessary additions or changes to your knowledge base from the previous
exercise so that the questions that follow can be answered. Include in your report a
discussion of your changes, explaining why they were needed, whether they were minor
or major, and what kinds of questions would necessitate further changes.
a. Are there other people in Safeway while John is there? [Yes—staff!]
b. Is John a vegetarian? [No]
c. Who owns the deodorant in Safeway? [Safeway Corporation]
d. Did John have an ounce of ground beef? [Yes]
e. Does the Shell station next door have any gas? [Yes]
f. Do the tomatoes fit in John’s car trunk? [Yes]
 
Answer Preview………………
The assertions made on the knowledge base include. The weight of three pounds is impossible for the child to carry. The approximation of the different weights of the tomatoes is as below. 3 globe medium tomatoes= 1 pound. 8 plum small tomatoes = 1 pound. Ground beef 1 pound. The categorization of items is important as they are put in the same section. Supermarkets do not produce vegetable including tomatoes. The goods sold in supermarkets are produced by others. Supermarkets sell varied items from home items to personal items.Purchasing of items requires payment either by card or cash. Objects. Supermarket, payment, customer, goods, Classes. Tomatoes, child, John , Mary, adult. Relationships. Mary and John are customers. Deodorants and tomatoes are goods in the supermarket. There are two types of payment using card and cash. Customers are either children or adults…………….
APA 453 words