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    A1. If Abraham Lincoln was French then the Moon is made of green cheese.
    2. Abraham Lincoln was French.
    3. Therefore, the moon is made of green cheese.


    B 1. The Washington Redskins are better than the Miami Dolphins. 2. But the Miami Dolphins are better than the Buffalo Bills. Therefore, 3. The Washington Redskins are better than the Buffalo Bills.

    C 1. If all cats are black then Tiffin is black. 2. Tiffin is black. Therefore, 3. All cats are black.

    D 1. If all cats are black then Zebedee is black. 2. Some cats are not black. Therefore, 3. Zebedee is not black

    Does anyone know if these arguments would be considered valid or invalid? Thanks
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    (Original post by PoppieCrean)
    A1. If Abraham Lincoln was French then the Moon is made of green cheese.
    2. Abraham Lincoln was French.
    3. Therefore, the moon is made of green cheese.


    B 1. The Washington Redskins are better than the Miami Dolphins. 2. But the Miami Dolphins are better than the Buffalo Bills. Therefore, 3. The Washington Redskins are better than the Buffalo Bills.

    C 1. If all cats are black then Tiffin is black. 2. Tiffin is black. Therefore, 3. All cats are black.

    D 1. If all cats are black then Zebedee is black. 2. Some cats are not black. Therefore, 3. Zebedee is not black

    Does anyone know if these arguments would be considered valid or invalid? Thanks
    A and B are, but think about C and D more carefully.
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    agree. C and D - are wrong
 
 
 
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