Sophistic argumentation styles were equated with fallacious arguments. The fallacy is in concluding the consequent of a fallacious argument has to be false. Arguments containing informal fallacies may be formally valid, but still fallacious. Nonetheless, Katris rejects the accusations as "unsubstantiated" and "obviously fallacious". Notability may be falsely conferred with fallacious reasoning. A sophist is a person who reasons with clever but fallacious and deceptive arguments. A sophist is a person who reasons with clever but fallacious, willful and deceptive arguments. Fallacious arguments often take that form. A sophism is a fallacious argument, especially one used deliberately to deceive. Other related fallacious arguments assume that a person without status or authority is inherently reliable. Fallacious arguments are very common and can be persuasive in common use. Reification, while usually fallacious, is sometimes considered a valid argument. Thus the argument is a fallacious one. It is possible to show that the first premise of arguments like these is fallacious. A fallacious argument may be deceptive by appearing to be better than it really is.