I think we're of a similar mind -- I was imagining a system where a user could input certain premises they agree with or values that they hold, and then they could see what conclusions follow (or would follow, with the addition of further premises). You certainly could end up with dubious conclusions, given what premises you start from. At the very least, though, different ideologies would actually come with an explicit set of premises, and people who disagree with those ideologies would be able to see exactly what they disagree on.