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One can object to (or criticize) an argument by objecting to its soundness without objecting to the conclusion of the argument.
Here’s an argument:
All bearded people are over ten years old.This is an invalid argument -- and therefore an unsound argument. But in objecting to the argument I am not thereby objecting to the conclusion of the argument. (The conclusion is true and I accept it.)
Lee is over ten years old.
Therefore, Lee is a bearded person.
The form is:
All A are BTo see that this is an invalid form, consider the substitution instance:
c is B
Therefore c is an A.
All multiples of 4 are even.
6 is even.
Therefore, 6 is a multiple of 4.
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