What makes people irrational thinkers?

[Belacqua]

I'm talking about a person who believes slavery is justifiable and okay to give a brief summery of "Refuse to think for themselves" 

I certainly agree that slavery is bad.

However, I don't know the individual you're talking about, so I don't know whether that person thought for himself or not. It is possible, I think, to think for yourself and end up with a conclusion which I personally find reprehensible. 

In our time, place, and social class, it's probably the majority view that slavery is bad. So I suspect there are a lot of people who think slavery is bad who have never thought about it for themselves. If they currently have a good belief (e.g. slavery is bad) is it still necessary for them to think for themselves? 

Maybe there's a better phrasing I'm not great with words yet. 

You're doing fine. I'm just enjoying the chat.

I care that they're able to make their own choices without getting stuck in what others say rather than looking into it. These are the things that concern me that i am speaking on.

Personally I agree with you.

But if we radically accept that we should question our beliefs, then there is another one we should question. 

Is it really always true that people should make their own choices? What if they're stupid and constantly make stupid choices? 

I think that a lot of people "think for themselves" to the extent that they accept to status quo of their time place and social class, and then congratulate themselves on having thought for themselves.

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If the evidence for them was anywhere close to as good as that for dark matter, it would be a revolution in theology.

Right. You have a strong belief that a certain kind of evidence is necessary but lacking.