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2 be logical

Introductory Logic Lesson 31-32

QuestionAnswer
A statement that affirms an outcome based on a condition & has the form: If P then Q A Hypothetical
An argument that uses only hypothetical statements A Pure Hypothetical Syllogism
The __________ of a hypothetical statement is the condition, the part following the "If". Antecedent
The __________ is the result of the condition, the part after the "Then" Consequent
An argument that uses both hypothetical & categorical statements A Mixed Hypothetical Syllogism
2 basic, valid, hypothetical syllogisms Modus Ponens &Modus Tollens
2 basic, invalid, mixed hypothetical syllogisms Affirming the consequent & Denying the antecedent
The Latin phrase __________________ means "it does not follow", i.e., that an argument is invalid. Non Sequitur
What can you use to construct syllogisms as well as analyze them? Logical Techniques
1st step to establishing the truth of a statement Put the statement to be established into categorical form
2nd step to establishing the truth of a statement Find a valid argument form (mood or figure) which has that type of statemen as a conclusion
3rd step to establishing the truth of a statement Place the statement as the conclusion of the selected form of syllogism, and fill in the known terms, leaving the middle term blank
4th step to establishing the truth of a statement Find a middle term that makes the premises true, thus completing the argument
Created by: MrsHough
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