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QUESTION OF VALIDITY - Coggle Diagram
QUESTION OF VALIDITY
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Validity (tính hợp lệ)
an argument:
- the truth of the premises logically
- guarantees the truth of the conclusion
Example
Elizabeth owns either a Mercedes or a Honda.
Elizabeth does not own a Honda.
Therefore, Elizabeth owns Mercedes.
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Elizabeth owns a car.
Elizabeth does not own a Honda.
Therfore, Elizabeth owns Mercedes.
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Soundness (tính hợp lý)
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Example
Valid but not sound
All dogs can fly.
Lassie is a dog.
Therefore, Lassie can fly.
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valid and sound
All humans are mammals.
Jacob is a human.
Therefore, Jacob is a mammal.
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