One of my roommate's bf was philosophy and math double major.  We talked quite a bit, took some of the same classes,  and he was one smart dude.  As for myself,  I was philosophy and mechanical engineering. 


Ìd say 4 things about adding philosophy
- say goodbye to social life.   Philosophy was difficult,  on par with engineering
- it's the most rewarding college experience
- you'll piss people off when you think much farther ahead then they will
- look into law school afterwards.   I wish i had.   You'll look better than most with only a liberal arts degree