<p>My D freely stated what she was unsure of in her essays. She thinks she wants to major in physics, but is unsure if she is interested in theoretical or experimental physics. She told colleges she wanted to explore both, and commented on why their programs seemed well suited to allow her to do that. So there is nothing wrong with being unsure of your major in your “why X” essay, and maybe telling them a couple of things you would like to explore and why their college can help you do that. Colleges do not expect you to have a ‘finished’ idea of what you want to do – they want to help you figure that out. So don’t worry about sounding like you have it all figured out. :)</p>