I have seen this seeming contradiction up close and personal and it has nothing to do with knowledge or training, it has to do with untested ideas and the lack of a challenge to form consistent sets of value. That is a failing of our culture, of many cultures, and of the educational system. The propaganda in media doesn't help nor does the numbness it creates to informal fallacies. If you spent your time discovering all the flaws in reasoning that get pitched at you in a day, you would have no time for anything else. This is a side-effect of "free speech" that depends on the size of the megaphone and what it costs to use. Citizenship requires time to reason and to think and the drivers of mass media do not want individuals to take time to think.So the barrage is a kind of mind control where the intent is to flood and discourage reflection. It is no wonder that people have such unconsidered views and that there are whole sections of their opinions that are inconsistent and viral. That is how the political machines and the corprorate controllers want it. They want a population of consumers driven by impulse and who are maleiable and easily manipulated.
A couple of days ago there was a post about a study in which the test subjects would rather give themselves electric shocks than have to spend fifteen minutes alone with just their thoughts. Not only is that classical conditioning but it may reveal that many people are afraid of the thoughts that come up when they are quiet and alone. Not only is it not in the interest of the power structure that people have the time to reflect but it is also in their interest, particularly of business people that people do not have any practice debating, discovering formal logical errors, or understanding the informal fallacies. Surely logic is important for many important pursuits in society, such as in mathematics, but a tiny elite knows about formal proofs and logic and can follow that kind of reasoning. It isn't that people are unintelligent, it is that they are unpracticed and untrained and there are powerful forces in society that want them to remain that way.
I believe that Social Media is actually a case in point, and that the blog is an impediment to people using the Internet to reason if they want. Social Media is about the propaganda va;ue of marketing in business, nothing more, and the blog restricts control of the discussion by ownership of topics. It isn't that you can't hold a reasoned conversation in a blog; it is that the structure of blogs and Social Media do not help you communicate and actually gets in the way. That is intentional by the comercal interests who drive Social Media, and makes the point that the power structure in society is not at all interested in helping us communicate and reason in the way that enables our citizenship in a society that pays lip service to democratic institutions.
What would change this is to restore some of the structure in discussion groups to the web and do away with blogs. Mark Zuckerberg's "Simple" criterion is just the wrong model and shows that Facebook is about manipulating its users.
We hear "Shhh, USENET" because it has become the avenue for pirated content and porn, but in the text-only groups beginning in 1984, there were some lively debates in which it was possible to practice your reasoning, debating, and writing skills. We need to bring some of that back and the Internet is a good place to do that, too bad that opportunity is being wasted on Social Media and Blogs. USENET discussion groups and their message structure contains the tools needed to rescue public discourse in the world, despite what Zuckerberg claims, If you want a demonstration compare what is in the DejaVu archive of USENET that Google owns with Google Groups and Google+, There is no comparison, and the fact that Google preserved the archive of old USENET posts is very telling WRT the above and as compared with the communication style they have set in their products.
Slashdot has some of the things needed, but the proposed changes to the UI are a step in the other direction, while at the same time the Social Media style of story promotion is a regression. A fairly topical subject hiererarchy like in USENET newsgroup naming is actually superior to the way topics are promoted on Social Media sites. It allows for readers to reconnect with the content even when the subject lines and threads have changed, If you look at the lack of followon to most social mediis threads, this is the reason. So contextual reply and control of the topic line isn't really enough, a topic hierarchy really helps. Slashdot could improve this by allowing for users to enter the site through the major categories rather than the headlines, which are chosen by editors.