Errors are all around us. Every time we turn on a television or radio, or read a newspaper, we see or hear errors. According to Dictionary.com, an error is defined as a false notion, statement, or argument based on a false or invalid inference, incorrect reasoning, or belief; error, or the quality of being deceptive (www.Dictionary.com). Misconceptions are part of everyday life and become an essential element in certain aspects of life. Political campaigns and journalists would be lost without the use of errors. Errors can be divided into two broad groups: relevance errors and insufficient evidence errors. Relevance errors occur because the premises are logically irrelevant to the conclusion. Insufficient evidence fallacies occur because the premises fail to provide sufficient evidence to support the conclusion, even though the premises may be logically relevant to the conclusion (Bassham, 2000). In this article, I will define three fallacies, explain their importance for critical thinking, and discuss their general application to decision making. The three fallacies I will talk about are Ad Hominem (attacking the person), Two wrongs make a right, and the slippery slope. Ad Hominem (attacking the person) Ad hominem occurs when we reject a person's argument or claim by attacking the person rather than the person. the person's argument or claim (Bassham 2000). This type of error is common in political debates. If a candidate cannot find valid reasons to challenge another candidate's statements or ideas, then they are attacking the person themselves, not the issues. It is important to mention that not all personal attacks are mistakes. A personal attack is only an error if an arguer rejects another person's argument or claim, and the arguer attacks the person making the argument or claim, rather than attacking the right- basis of the argument or claim..