Everyone is already indoctrinated, Bill...just in what set of beliefs is the question? We are all as children indoctrinated by the collection of cultural assumptions that is all around us. Such indoctrination is, in fact, inescapable, regardless of whether you belong to an organized religion or not.

Some cultures, of course, are more reasonable than others. ;-) But then it depends on what you think is "reasonable", doesn't it?

I do recall being taught how to think...to some extent. It might have comprised 1 or 2% of what I was taught in school. The other 98% of it was being taught what to think. And I was well aware of that at the time.

For a person of even moderate intelligence knowing how to think comes pretty naturally. You observe what is around you, and you deduce based on your observations. You form conclusions through reasoning, based on what you see, hear, and experience. But if the discipline of learning how to think is encouraged by good teachers, it can become stronger. That was certainly true in ancient Greece among those who attended philosophical schools. I think it is less true now, and that's mainly because the primary motives in this society are commercial ones, not philosophical ones.