premise: How to register a gun<br>Look up your state's gun laws online before purchasing a gun. Depending on the state you live in, gun registration may or not be necessary. Visit your state's website to get information about its particular gun regulations.
hypothesis: In some states, registration is not necessary but in others it is a requirement.
reason: I just re-summarized part of the information regarding registration. I do not know why it fooled the AI; maybe because the sentence was long?