What are the two formal fallacies?

Question

I remember being quite confused by all the specialized terminology, etc., in logic and philosophy classes, but there are things on this webpage that may help you:

http://grammar.ccc.commnet.edu/grammar/composition/argument.htm

The basics of setting up a good argument are here -- whether for writing or debate or whatever. And if you scroll down almost to the bottom, there are additional links, including one called Logic: An Introduction to Fallacies.

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The two formal fallacies are; the fallacy of denying the antecedent and the fallacy of affirming the consequent.

describing how the philosophies of Socrates, Plato, and Aristotle relate to each other concerning the following topics:Logic and Argument in Philosophy
Knowledge and Methods of Acquiring Knowledge.Love.Existence.

Someone PLEASE help me with this. describing how the philosophies of Socrates, Plato, and Aristotle relate to each other concerning the following topics:

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