/sci/ - Science & Math

I graduated with a 3.3 in engineering, but I feel like I'm still so fucking dumb compared to actual brainfags. I took the calculus series, linear algebra, and differential equations, but I only remember the application of those things to relevant issues in my field. I can tell what things are and how they work, but I can't explain WHY they work. I don't feel like I truly understand the science and math I apply, I just know how to use them. Is that what separates me (an upper level midwit) from the gigabrains and gifted minds of this world?