A school that I like a lot, but that is not my top choice, is pressuring me to accept by April 1. However, I am still waiting to hear back from my top choice, and am currently waitlisted at my #2...if accepted at either of these schools, I would almost definitely immediately say yes (pending some financial considerations)...is it ethical to say yes to #3, knowing full well that I may change my mind very soon? I like all three schools very much, they all have strong programs in my field, and if I only get into #3, I will certainly go there.