Premise 1: Some fruits are sweet.
Premise 2: Apples are fruits.
Unsupported conclusion: All apples are sweet.
The premises never establish that apples are among the sweet fruits, much less that all of them are. A conclusion must not claim more than the premises warrant.
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Changing “every” to “some” changes the inference
Ḥujjah: Deriving a Conclusion from Known Judgments
Premise 1: Some fruits are sweet.
Premise 2: Apples are fruits.
Unsupported conclusion: All apples are sweet.
The premises never establish that apples are among the sweet fruits, much less that all of them are. A conclusion must not claim more than the premises warrant.