scibri (2544842) writes "Your moral positions may be more flexible than you think. Researchers in Sweden have tricked people into reversing their opinions on moral issues, even to the point of constructing good arguments to support the opposite of their original positions (paper in PLOS ONE).
They used a "magic trick" to reverse a person's responses to such moral issues as "Large-scale governmental surveillance of e-mail and Internet traffic ought to be forbidden as a means to combat international crime and terrorism", by switching "forbidden" to "permitted" when the subject turned the page of the questionaire. When asked to read back the questions and answers, about half of the subjects did not detect the changes, and a full 53% of participants argued unequivocally for the opposite of their original attitude in at least one of the manipulated statements."
Link to Original Source