Logical fallacies can be formal and informal. Formal fallacies arise when the argument is invalid as to its structure. Informal fallacies happen from either defective reasoning or misleading content. Invalid syllogisms are formal fallacies. Personal attacks; trying to set up snaky misrepresentations of the opponent and using a couple of doomed false choices all these kinds of mistakes are informal fallacies. Each one reduces the rigors of logic and thus reduces the likelihood of dependability of the argument.

Ad hominem attacks the person and not the argument. Straw man misrepresents opposing views. False dilemma presents limited choices and ignores alternatives. Stating a conclusion in the premise is circular reasoning. Appeal to authority uses credibility instead of evidence. Slippery slopes exaggerate consequences. Fallacies exist in arguments, media, and conversation.

Fallacy traces the argumentative integrity. When invalid logic produces an argument, false conclusions follow. Emotive distractions tend to be decoys from the truth. Opposing views get misrepresented. Arguments based on fallacies lack credibility. Wrong reasoning makes arguments more effective while removing fallacies keeps logic consistent.