Campaign Seminar Final Paper

Murder Mystery:

Four guests (Colonel Mustard, Professor Plum, Miss Scarlett, Ms. Green) attend a dinner party at the home of Mr. Boddy. Suddenly, the lights go out! When they come back, Mr. Boddy lies dead in the middle of the table. Everyone is a suspect.

Upon further examination, the following facts come to light:

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• Mr Boddy was having an affair with Ms. Green.

• Professor Plum is married to Ms. Green.

• Mr. Boddy was very rich.

• Colonel Mustard is very greedy.

• Miss Scarlett was also having an affair with Mr. Boddy.

There are two possible motives for the murder: hatred and greed. Someone hates someone else if that other person is having an affair with his/her spouse. Someone is willing to commit murder if he/she is greedy and not rich, and the victim is rich.

Who are the suspects?

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2- Below is a list of the most recent American presidents:

Donald Trump 2017-

Barack Obama 2009-2017

George W.Bush 2001-2009

Bill Clinton 1993-2001

George H.W.Bush 1989-1993

Ronald Reagan 1981-1989

Jimmy Carter 1977-1981

Gerald Ford 1974-1977

Richard Nixon 1969-1974

Lyndon B.Johnson 1963-1969

John F. Kennedy 1961-1963

a) Build a knowledge base using the predicate directlyAfter/2 which encodes one president is directly after another president.

b) Formulate and add a RULE called directlyBefore/2 tells which president is directly before which other president.

c) Define another rule called after/2 that tells us which president is (directly or indirectly) after which other president. For example, the query after(‘Barak Obama’, ‘John F. Kennedy’). should evaluate to be true, while after(‘George H. Bush’,’Barak Obama’). should fail.

d) Test your implementation by asking queries. Write down your query and also the result.

• Is Obama directly before Trump?

• Is Carter after Johnson?

• Who are after Ford?

• Who are the presidents in the knowledge base?