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schweet schweet
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2 weeks ago
Consider "Since all whales are mammals, some mammals are whales." This inference, drawn by conversion, is

▸ valid

▸ not valid

▸ valid by limitation
Textbook 

How to Think Logically


Edition: 2nd
Authors:
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hhortonhhorton
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2 weeks ago
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not valid

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Smart ... Thanks!
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Helped a lot
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