part 2-5 basic components, structure and logic of argumentation

# That is if you were to imagine that all the premises

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Unformatted text preview: has the following hypothetical property: If all the premises are true, the conclusion cannot be false. That is, if you were to imagine that all the premises were true, then it would be logically impossible for the conclusion false at the same time Logic guarantees of the truth of the conclusion, (now provided that the premises are true) Valid Argument Premise All actors are robots Premise Tom Cruise is an actor Conclusion Therefore, Tom Cruise is a robot Premise If Michigan scores the most points then they win the game. Premise Michigan scored more points. Conclusion So, Michigan won the game Valid Argument Premise Tom is happy only if the Tigers win, Premise the Tigers lost; Conclusion therefore, Tom is not happy. The Argument Form is... If A then B A Therefore, B When we say "If A then B" it means that, every time, if A is true or false, then B is true or false also. Click to View the Linked YouTube Video Below Valid Argument Forms i. If Joe makes this field goal, then Davison wins ii. Joe made the field goal . iii. Therefore the Davison won. If P then Q i. If the patient has malaria, then a blood test will indicate that his blood harbors the P. vivax virus ii. Blood test indicate that the patient’s blood does not harbor the P. vivax virus. iii. Therefore the patient does not have malaria. If P then Q P Therefore Q Not Q Therefore Not P Valid Argument Forms i. Either the Detroit Tigers or the Giants will win the World Series. ii. The Tigers did not win the Word Series iii. Therefore, the Giants won Either P or Q i. If John gets a raise, then he will buy a house. ii. If John buys a house, he'll run for city council. iii. Therefore, if John gets a raise, he will run for a position on the city council If P then Q Not P Therefore Q If Q then R Therefore ... If P then R Valid Arguments Premise If a plane is flying it is in the air. Premise Flight 999 is flying, Conclusion Therefore it is in the air. Premise If P then Q Premise P Conclusion Therefore, Q Valid Arguments Premise If there are clouds in the sky, then rain is possible. Premise No rain is possible. Conclusion Therefore, there are no clouds in the sky Premise If P then Q Premise Not Q Conclusion Therefore, Not P Valid Arguments Premise Either Elizabeth owns a Honda or she owns a Saturn. Premise Elizabeth does not own a Honda. Conclusion Therefore, Elizabeth owns a Saturn. Premise Either P or Q Premise Not P Conclusion Therefore, Q Valid Arguments Premise All toasters are items made of gold. Premise All items made of gold are time-travel devices. Conclusion Therefore, all toasters are time-travel devices. Premise All P are Q Premise All Q are R Conclusion Therefore, All P are R Invalid Arguments Invalid: An argument where the conclusion could be false even if the premises are true ○ Premise: Steve owns a Lexus automobile. ○ Premise: Rich people own Lexus automobiles ○ Conclusion: Therefore, Steve must be rich The Argument Form is... ● P is Q ● R is Q ● Therefore, P is R Invalid Argument Forms i. Anyone who lives in th...
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## This document was uploaded on 02/26/2014 for the course PHILOSOPHY 1101 at Douglas College.

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