5

2

Will "All A is B" always imply "If A then B?"

If so, can we say that the following follows the form of Modus Ponens?

*All dogs are mammals.
Toby is a dog.
So, Toby is a mammal.*

Can I rewrite the above to be:

*If it is a dog, it is a mammal.
Toby is a dog.
So, Toby is a mammal.*

When I rewrote it, it seems to follow the textbook definition of Modus Ponens, but I was wondering if it was ok to classify the original one as Modus Ponens as well. I have only very recently started studying philosophy, so I apologize if my terminology is incorrect/making some very fundamental misunderstandings.

2NO; the original argument is a

syllogismand not aModus Ponens. In your rewrited form you have "If it is a dog, it is a mammal" as first premise; in order to applyMPthe second premise must be: "It is a dog". Now the conclusion will be "So, it is a mammal.". – Mauro ALLEGRANZA – 2017-06-09T05:56:08.730Not at all; the first depends on identity, cause is not a factor; in the second, the reverse holds. – Mozibur Ullah – 2017-08-12T04:00:26.813