>>5022
Both questions were centered around the notion of critical thinking. Unless you're saying that specialists or intelligent people with subpar means at their disposal reaching conclusions is an example of forming 'stupid' ideas *because* of poor critical thinking, you haven't answered the questions.
>>5013
there are generally two reasons why someone doesn't apply critical thinking (I'm assuming you mean this in the sense of 'being non-dogmatic as well as attempting to form opinions while being as informed on the topic as reasonably possible' - do specify if you are thinking of something else). One is a simple lack of resources, which is mostly either time or energy, and another is the outright incapability of doing so.
In both cases, when you form opinions as a result of trusting the authority of someone you percieve as competent and worthy of your trust, I do not think that it is fair to call the people in question stupid, even if, to you, their trust in these particular people may seem particularly badly misplaced.
But I would agree with you that, should they have arrived at their opinions on their own, without having the ability or invested the resources to investigate it thoroughly, while *also* holding on to their opinion *as if* they had foolproof reasons to do so, are deceiving themselves either willingly or unwittingly. the latter I would consider stupid, since I have no other word for people who feel unjustifiably competent regarding a matter, in which they know full well they have invested little to no effort, but nonetheless fail to notice their feeling of certainty is unfounded. the prior group is more willfully ignorant or obtuse than stupid, but I have no problem with people like >>5014 calling them 'stupid' for that.