Hello, mjamie0.
In reply to your commentary: it seems that your "good logic professor" sorely misled you about the possibility of logic helping inform us on moral matters.
I suggest you study chapter 7 of my book on David Hume, concerning the is-ought dichotomy:
http://www.thelogician.net/6_reflect/6_Book_1/6a_chapter_07.htm
And if you have the patience, go on and study my book on Volition:
http://www.thelogician.net/4b_volition/4b_vol_contents.htm
Maybe this will help you to distinguish between opinion and knowledge.
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Something about you (optional) human