<p>If I am still currently undecided whether to go with a MS or PhD, what should I say in my SoP? Can I just not mention it? I'm only applying for the MS program right now.</p>
<p>Well, you probably should mention something because it will lack a clear focus if you don't. If you do decide to say that you're gunning for a Ph.D., make sure you say it in a way that values their master's program and not just treat it as a stepping stone to bigger and better things.</p>
<p>It's really up to you though.</p>
<p>Just explain - and I'm only guessing that this is what you mean - that you're looking forward to the more intense, research-oriented work of the MS and hope to decide during the MS whether to go on for a PhD. Many, many people do this, so it's not a big deal.</p>