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<p>Heh, yeah, my friend picked up a psychology double in addition to his materials science major in the last three semesters of being at the school. He had been taking psych classes as his “fun” subject for a few years, so the major kinda happened by accident when he realized he just needed five more to get a double instead of his minor.</p>
<p>The only requirement is if you double major at CMU and you’re in engineering, the engineering school must be your “home” school.</p>