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Started off as a business major. Took calculus for business and economics and quickly changed to a double in pol sci and soc.
Went to law school so it didn't really matter anyway.

Idk

Didn't change it once.

I didn't. I knew what I wanted to do as a sophomore in high school.

Never. I researched what I wanted to study and did it.

Basically just once, from a single-track 6-year premed/med school program, to biology, but after dropping out and returning to college quite a few years later.