<p>ido potter, its not that you can predict the subject of the essay but you can prepare it by practicing on the other prompts. You can actually reuse your examples that you have prepared while practicing and use it on your actual essay during the SAT. And these examples doesn’t really matter - spiderman and shakespeare meant the same thing for SAT essay correcters, what matter to them is the fluency and correctness of the essay and not the quality of examples.</p>