Mission Critical

# Mission Critical - Sunday Mission Critical(Deductive...

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Sunday, August 11, 2002 Mission: Critical (Deductive Arguments) Page: 1 http://www.sjsu.edu/depts/itl/graphics/ deduc/deduc.html Introduction to Deduction As we explain in the Introduction to Induction and Deduction , an argument is inductive if its major premise is based on observation or experience, and deductive if its major premise is based on a rule, law, principle, or generalization. In general, there are two distinct ways of expressing a deductive argument: as a syllogism, or as a conditional. Any deductive argument can be expressed as either a syllogism or a conditional, though some arguments may seem to lend themselves more naturally to one form or the other. Similarly, tests for the validity of syllogisms and conditionals may appear quite different, but do essentially the same thing. Syllogisms: The major premise of a syllogism states that something, Y, is or is not true for all or part of some group, X; the minor premise affirms or denies that some group or individual, Z, is part of X; and the argument then concludes whether that thing Y (from the major premise) is true or not true for that group or individual Z (from the minor premise). One form of a syllogism can be expressed by the following paradigm: All X are Y Z is X Therefore, Z is Y Consider the following example: Everyone in class today received instructions for writing the essay. Mandia was in class

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Mission Critical - Sunday Mission Critical(Deductive...

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