Every argument has a claim—also called an assertion or a proposition—that states the argument’s main idea or position. A claim differs from a topic or a subject in that a claim has to be arguable. It can’t just be a simple statement of fact; it has to state a position that some people might disagree with and others might agree with. Going from a simple topic to a claim means stating your informed opinion about a topic. In the essay you just read, the general topic is social investing—specifically, social investing in the fast-food industry. The arguable claim, however, is that investing in fast-food companies can be socially responsible. Notice that the topic may be a single word or a phrase, but the arguable claim is stated as a complete sentence.

It’s important to note that neither a published author nor a student writer is likely to develop a strong claim without exploring a topic through reading about it, discussing it with others, brainstorming, taking notes, and rethinking. After looking into a topic thoroughly, then you are ready to develop a position on an issue. For example, let’s use the topic of single-sex classrooms. You will notice, first of all, that a simple statement of the topic does not indicate whether you support the notion or challenge it. Let’s consider several directions to take with this topic.

The first statement may be true, but it is easily verified and not arguable; thus, it is simply a topic and not a claim. The second statement has more detail, but it’s easy to verify whether it is true or not. Since it is not arguable, it is not a claim. The third statement is a claim because it is arguable. It argues that single-sex classrooms are ineffective and that preparation for the workplace is an important way to measure the effectiveness of an education. There are those who would disagree with both statements and those who would agree with both. Thus, it presents an arguable position and is a viable claim.