To me people use what they believe to be true to make that decision. To me all decisions demonstrate a persons actual beliefs, as why would they decide to do something if they did not honestly believe it would yield a desirable outcome. (that outcome does not have to be viewed as desirable to anyone but them, for instance suicide. Nor does it have to be the immediate outcome which is desirable, it could be part of a long con.)
>Consider the population of wives cheating on their husbands. Do you really believe that only an insignificant number of them think what they're doing is wrong?
Yes, I believe that all cheating spouses, people who commit crimes, and sociopaths have developed an internal belief structure which lets them justify actions that may come at a cost to themselves or others as being probable of a desirable outcome for them.
>First, you need to establish that we differ in our definitions.
Have I done so to your satisfaction? I thought it was common knowledge that people often echo views they do not actually adhere to so that they will appear to conform to societal norms, which represents the crux of my definition. Politicians frequently offer a very obvious example of such a tendency, but if you know anyone well enough you can see the inconsistencies in what they say and what they do. Their actions demonstrate how they actually make decisions and what they believe in my opinion, not what they say.
You will know which are which by being introspective about the decisions you have made in the past and are considering making currently, and try to understand what basis you are truly using for that decision, besides the surface 'Well this feels right' reason.