section_path: Reason compared to related concepts/Logical reasoning methods and argumentation/Fallacious reasoning
section_name: Fallacious reasoning
paragraph_text: Fallacious reasoning
  
  Flawed reasoning in arguments is known as fallacious reasoning. Bad reasoning within arguments can result from either a formal fallacy or an informal fallacy.
  
  Formal fallacies occur when there is a problem with the form, or structure, of the argument. The word "formal" refers to this link to the form of the argument. An argument that contains a formal fallacy will always be invalid.
  
  An informal fallacy is an error in reasoning that occurs due to a problem with the content, rather than the form or structure, of the argument.