<p>I would think that at least a few of the major prep/major classes (Chem, Calc, etc.) for CogSci at UCSC would count towards a major in Chem/Bio engineering. It’s not like you would have to waste more time completing your Gen Ed again either. Also, I may be misinformed, but why is it so bad to have two BS degrees from a UC? If anything, I would think that would make you more marketable to future employers for having completed to areas of study. Do school’s frown upon this as being too indecisive?</p>
<p>If you truly do not believe you would be happy in an area of CogSci study, then do something else! If you’re going to be doing something for the rest of your life, you may as well enjoy doing it. If your heart is telling you to pursue Bio/Chem engineering, then find a way to do it. There are always options, although finding them may not always be so easy. :)</p>