最終更新日：2024/08/01
The obvert of the proposition 'All cats are mammals' is 'Some cats are not mammals'.
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The obvert of the proposition 'All cats are mammals' is 'Some cats are not mammals'.
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The obvert of the proposition 'All cats are mammals' is 'Some cats are not mammals'.
The obvert of the proposition 'All cats are mammals' is 'Some cats are not mammals'.
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