So long story short, one of the science professors who promised to write me a LOR is currently ghosting me for a month. Currently, I have 4 LOR (1 from the dentist, 1 from my PI, also a dentist, 1 from a science professor, and 1 from a liberal arts professor). I do know a lot of schools require at least 2 letters from science professors, but my top school does not. So I'm debating whether I should apply to my top school for now. Would having just 3 letters of rec risks my chance?