I have 2 science lors and one is my PI because i did take it as credit one semes and received a grade. im hoping it's okay. has anyone else done this before? im also going to try and get an additional science letter this summer, i think by august.
Won't be a problem with Columbia. Only one of my science LORs was from a former instructor of mine, my other two were from my PI and a collaborator. Nothing was mentioned about it and I was accepted.