Even philosophy classes are biased

I'm sitting here in my phi class and the teacher is presenting us both sides of the argument like a good phi teacher does, except when it comes time for us to make a decision he says:" the choice is obvious."
I disagree, I think the other side has a valid argument and now we are down to personally weighing which outcome we would rather have. --mostly though I agree with him...i just think it's a dirty tactic to say that.