how to argue
Structure of a Logical Argument
Whether we are consciously aware of it or not, our arguments all follow a certain basic structure. They begin with one or more premises, which are facts that the argument takes for granted as the starting point. Then a principle of logic is applied in order to come to a conclusion. This structure is often illustrated symbolically with the following example:
Premise1: If A = B,
Premise2: and B = C
Logical connection: Then (apply principle of equivalence)
Conclusion: A = C
In order for a conclusion to be considered valid all the premises of an argument must be true, and the logical connection must be valid. I use the term �valid� here specifically to refer to such conclusions, because a conclusion may still be �true� even if it is not valid. This is because it is possible to use wrong information, or faulty logic to reach a conclusion that happens to be true. An invalid argument does not necessarily prove the conclusion false. Demonstrating that an argument is not valid, however, removes it as support for the truth of the conclusion.
Breaking down an argument into its components (sound familiar its a Gillettism)is a very useful exercise, for it enables us to examine both our own arguments and those of others and critically analyze them for validity. This is an excellent way of sharpening one�s thinking, avoiding biases, and making effective arguments.
http://www.theness.com/articles.asp?id=38
Novella, D. S. (2006). How to Argue . New England Skeptical Newsletter , 1-4.