This is more of a matter of coming to terms with facts and/or arguments. Often times people will form (knowingly) form opinions without having the data necessar

This is more of a matter of coming to terms with facts and/or arguments. Often times people will form (knowingly) form opinions without having the data necessary to draw any sort of conclusion. What is being demonstrated here is the willingness for people to override their intuitions with facts or arguments. When they educate themselves, the original intuitions are forgone and overwritten with conclusions extrapolated from new data because their first opinions never had any structural (logical, rational) foundation to begin with. So to clarify, it's not so much that opinions are changing, because their innate feelings on the subject likely don't change dramatically. It's the arguments and facts presented to frame the situation in a way that has been adapted to their ideals.