Schizophrenia is characterized in part by difficulty in telling the difference between internal and external signals. My guess is that virtually all “normal” people are characterized by their difficulty in telling truthful signals from bullshit.
Normal interpersonal relations are conducted with signals that have low resolution. By that I mean, signal references are rarely unambiguous. In fact, they are very often not even truthful. An ambiguous signal will frequently be interpreted wrongly and lead to problems as serious as those that result from untruthful signals.
The same is true in the public sphere.
Because low signal quality in the social/interpersonal realm is so common, we typically do not identify it as a problem. Furthermore, because we don’t know what to do about it even when we do notice it, we largely ignore it. But that does not mean it isn’t a huge problem.
FIML practice can fix this problem for participating partners. In the future, brain scans may help fix it in the public sphere.