This is a multi-stage thing to me, at least going by my own personal experience. I like to think of my self as a critical thinker, It’s something I see as a virtue, I also like to think of my self as fairly smart. But, if I really am a smart critical thinker, then I have to admit there is a possibility that I am not, and that I am just deluded.
Stage #1 – Be Born a Skeptic.
The first stage to me, would be that you need to be born a skeptic. I by no means intend to start a religious debate, but as an example: I was 6 years old when I learned the word “atheist” and decided that I was one. As a small child I was very manipulative, and I knew how to lie, this helped me spot lies, and even more so, helped me spot when I was being manipulated. I suspect my deceptive nature is what helped me be a skeptic so young.
Obviously this alone does not make you a critical thinker, and it may not even be a requirement at all, but it must help I think. To be someone who is more likely to question things.
Stage #2 – Live In The Free World.
As I have already mentioned, I was very skeptical at a young age, but I suspect I would not have been so skeptical, if I had been raised in a country that did not have free speech. If I had faced things like beatings and beheadings for speaking my mind, I would no doubt only think the things that I thought, and if I lived there long enough, maybe after a while, I would not even think such things.
If you have any hope of being a critical thinker, you need to be allowed to also be a free thinker, to me the two go hand in hand.
Stage #3 – Question Morality and Substitute your Own
As I said, for there to be critical thought, there needs to first be free thought. For example: If we simply accept that genocide is wrong, we can only ever give one answer, when asked, if genocide can ever be justified.
You need to make up your own mind, and decide for your self if genocide is good or bad. You need to do the same for everything, from murder to stealing candy. Even if you decide that genocide is bad, and can only ever answer that it is bad, at least you have the ground work and thought process to back up why it is bad. You can’t take anything at face value.
Stage #4 – Be a Victim of Some Bullshit.
At least once or twice in your life, you need to buy penis enlargement pills, or invest in time shares, or believe some conspiracy theories, or be worried by a dooms day prediction, or work in a pyramid scheme.
Being able to spot bullshit is not enough, once or twice you need to realize that you are not immune to the stuff. This also gives you a chance to get a good sniff of that bullshit, so you will know it when you smell it again.
Step #5 – Get Taken Down a Peg or Two.
Not only do you need to be a victim of some bullshit, but you need to be a victim of stupidity, you need to be put in your place a few times, and corrected by people who have stronger arguments or better facts.
Step #6 – Change Your Ways.
As I mentioned at the very beginning, I was a very manipulative kid, and I would lie all the time. This is something you need to stop doing, it is only a minor detail, but still important. You need to get out of the habit or circulating urban legends, don’t pass off stories that you know are not true as true. Don’t lie (to your self as well as others), and don’t make up things that you think could maybe work and tell them as if they would work for sure.
Step #7 – Eat Some Humble Pie
Learn to admit when you are wrong, Ignore the sting you feel the first few times you do it, until all you feel when you admit you were wrong is a general sense of fact.
Also you should take a look at some cosmology documentaries, not because they will make you a critical thinker, but because nothing will make you more humble than realizing what you are.
Step #8 – Doing The Hard Parts
Go online, or get out there, learn what a logical fallacy is, learn what logic is, learn how to formulate and argument and how to verify a source, learn about confirmation biased, watch some debates, read a heap of books and expose your self to loads of information.
Step #9 – Psychologically Self Harm
Do you believe aliens visit earth? do you think 9/11 was an inside job? do you believe you can predict the future? whatever you believe… take your pet theory and pull it to pieces. Take the ideas you hold to be true and moral and just and pull them to pieces too.
Now on step 9 you have the tools you need to start really figuring out what is real and what is not, take those tools and clear out anything that looks like it does not belong.
Step #10 – Humans Like Round Numbers
This thing really did not need 10 stages, 9 was enough, but my mind compelled me to add a 10th, just because my mind likes round numbers. As you go about your day as a critical thinker, keep in mind that people like to do stuff like this.
To me, a god giving man 10 commandments, just looks too tidy and convenient for my taste, maybe originally there where only 9 of them too.