Know how to fire up a combine and get all the fluids up to op temp?
WTF do i need calc for when i can do diff. eq, without paper/electronics? Can you do finite element analysis in your head?
You can do diffy q's without electronics? !! Hey, my niece and husband own the largest dairy farm in WI, combines included. OK, can't do FEA in my head, but I LOVE finding a straight line after doing log log transformations.