I'm very interested in critical thinking. I think it's a skill (i.e., type of thinking) that can be taught to anyone, regardless of personality type. Of course, some people may have a more natural inclination toward critical thinking than others, but that's true of many abilities that can be learned.
Let me start a list of some typical errors in critical thinking I regularly observe. Add to it, if you wish.
1. Concluding from anecdotal evidence--generalizing from limited personal experience (e.g., attributing obnoxious behavior of an individual to all who have the same MBTI type). This is also common when people make broad statements about health based on a friend's specific experience with a particular drug, supplement, or etc.
2. Ignorance of the scientific method. Even scientists are able to publish papers describing poorly designed experiments. Are the experiments controlled adequately? Is the statistical power great enough? Are the methods rigorous and clean? Are the conclusions justified by the reported data?
3. Confusing causation and correlation. For example, it was recently reported that the telomeres (ends of chromosomes) of regular, strenuous exercisers (e.g., those who run 80 or more Km. per week) were longer than those of the typical "couch potato." This is important because the longer the telomere, the "younger" a cell is and this may imply some relationship between rigorous exercise and anti-aging. However, it may also be that those who exercise the most do other healthy things that are the actual cause of the longer telomeres.
4. Arguing logically from a flawed assumption.
5. Making definitive statements from an incomplete data set. Sometimes, there's no choice and you do the best you can. But, at least, the incompleteness of the data set should be acknowledged. I was on a jury and this was a major issue. We convicted the SOB (child molester) anyway. Afterward, we were debriefed by the judge and he told us that the convict had had prior convictions which were not mentioned during the trial. Thus, we most likely were correct in convicting.
6. Cognitive dissonance interferes with objectivity. For example, it would be impossible for George W. Bush to admit that he was wrong to invade Iraq because he would not be able to accept the consequences and reality of such a terrible mistake.
7. Lazy thinking. Many people just don't like to think rigorously or deal with complexity.
8. Inability to deal with nuance. The world is not black and white. It's gray. People usually seem most comfortable having an
a priori philosophy (idealogy) that they impose on the world, whether it is appropriate for a particular situation or not. For example, it is simplistic to preach "free markets" and eschew all regulation. Clearly, free markets without regulation are like games without rules--they devolve into anarchy. The true complex reality of free markets is that they are best when regulation is optimum, allowing a balance between risk and safety.
Norton and Duty, I just want to say that as an INFJ I have never once found your critical thinking to be obnoxious or onerous, and would not ask you or anyone to stop practicing it. I wish people would take the trouble to explain things more often, actually.
And what Morgain said is very true:
To take that a step further: trying to control and prove and analyze feelings gets people in a lot of trouble sometimes; it can be the root cause of addictions, which allow us to numb or escape feelings we don't like, or which we find painful or irrational. If you're human, even if you are brilliantly NT and a scientist and all that, still, you are going to be prone to irrationality sometimes and you can't (always) critically think that away.
There is a brand of overly arrogant so-called "critical thinking" that makes a person sound like a 6-year-old know-it-all. (not that I'm accusing anyone here of doing that) It's the kind of critical thinking done by a person who has incomplete information but a tremendous amount of confidence. Not really all that critical or thinking.
Clearly, thought and emotion are intertwined. Many "T's" like to deny emotion, but it's there just the same. Notice how many "logical" people become angry or obnoxious during an argument. This is an example of lack of control and understanding of emotion. OTOH, many "F's" have difficulty detaching from their emotions to make an important decision purely on the facts. This can sometimes skew the decision away from the optimum one. It can also feel extremely uncomfortable.
Someone who uses ostensible "confidence" to hide bad thinking is a turd merchant, clear and simple. The worst of this type are demagogues and they are rife in politics, be they in government or the media.