Hello Teachers,<br/><br/>I have come across with this sentence structure and would like to know if it is grammatical.<br/><br/>It sounds ungrammatical to me because there are two independent clauses connected by just a comma.<br/><br/>Example,<br/><br/>1. You have to cook it in an oven, I guess.<br/>2. It has nothing to do with Biology, I guess.<br/>3. She's dating Jake, I guess.<br/><br/>Thank you so much!