<p>By not withdrawing all of your other applications you are breaking your ED contract with Cornell. That could result in Cornell rescinding your acceptance.</p>
<p>From the Cornell website:
“Remember that an early decision application is a commitment. You can apply under early decision to only one college or university. If you’re accepted at Cornell, you must withdraw any applications sent to other schools and send your acceptance deposit by the deadline in early January.”</p>
<p>In addition to that, it’s just plain selfish to not open up the spot for someone else as soon as you can.</p>