If you wish to make a valid and logical argument, then you must provide facts to support your opinions. For example, you can't just write that Peter Pumpernickel is a liar and a drug addict. You must provide specific facts to support your opinion.
- How do you know he is a liar?
- Can you tell me a specific story or time he lied to you or someone you know?
- What did he lie about?
- When did he lie?
- How many times has he lied?
- Why did he lie?
- What drug is he addicted to?
- Did you see him doing drugs?
- Who said he was doing drugs?
Far too often, I see writers make outrageous statements and then proceed to omit the most important ingredients: the facts, the data and the stories. I don't have to agree with your opinion. However, if you want to make a credible and valid argument then you must provide logical and substantive support for your opinion. Otherwise, you are simply reacting to an emotion without a thoughtful "reason." If you don't know why you feel and think the way you do, you cannot possibly expect the reader to believe, understand or respect a word you have written.