ABSTRACT
Every argument has several forms. The simplest merely shows that it is an argument, by identifying a premise or premises, a therefore, and a conclusion. Take for example the (tidied-up) Granny argument. Its simplest form is (F1). https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203061350/f5ce7580-7c0c-4392-aeab-0c1bd683fe20/content/fig95_B.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
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(F1) |
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Everyone who has a Rolls Royce is rich |
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My Granny has a Rolls Royce __________ My Granny is rich. |
Q — R |
The Granny argument is valid, but form (F1) is not. Explain why not.
If validity is purely a matter of form, how can the Granny argument have an invalid form?
