Logical Absurdities?
It sounds too harsh to describe someone stupid just by reading her few lines of the book reviews.
There could be just differences in opinions. There were certainly parts that resonated with my ideas about logic in the reviews.
If you looked at the new argument example given, I would have thought everything is clear on the sufficient and necessary conditions for the premises.
True definition, you asked. I was meaning the right and proper definition that fits for the better premise. So it could even qualify as a conclusion if it is self-evident enough, in which case, no further arguments are needed. But it is not possible to have a 100% true definition in many cases. One could only try to come up with the best true definitions.
The example arguments given in the OP and in the thread are simple enough to see the reasons how the premises could become a more sufficient definition by adding another definition i.e. dogs bark, and cats meow into the original definition which was a very wide definition (dogs are animals.)
I would have thought anyone would know what sufficient and necessary definitions as better premises are like.
True definitions are what philosophers are seeking to find and come up with in their thinking and debates process. Sometimes it can be found from defining the concepts, or when the definitions are not self evident enough such as God and God existence problems, then they make up the premises and go through the arguments supporting the premises to arrive at the conclusions.
OK - your comment on Valid arguments doesn't have to have false conclusions. But it would be judged as an inconsistent argument, if the supporting arguments are false or the premises way too loose, false or have no ground, even if valid. Due to that belief many logical debates seem to fall into quarrels rather than carrying on with the debating.
What I wrote here is mostly the points from Critical Thinking and Informal Arguments books, which look more practical and useful than the old traditional logic or symbolic logic in real life arguments and debate usage.