Answer by  
                                                                                          alz (2329)
                                                            
                          
                          
                                                          The two formal fallacies are: Number 1: The Fallacy of Affirming the Consequent and Number 2: The Fallacy of Denying the Antecedent. A fallacy is a mistake in reasoning, and a formal fallacy is a mistake in the form of the argument itself. I don't know exactly what they mean, but that is what they're called.