[header] How to make a logical argument [title] Select your thesis. [step] Your thesis is the theory you're attempting to prove. Choose something that is debatable, and be as specific as possible. 
For example, instead of saying, " pollution is bad for the environment, " which is not debatable, say, " to reduce pollution, the government should tax car owners more heavily. " [substeps] Try not to be combative or confrontational in your thesis.