Ruby456: "... the scientific method requires doubts to be investigated and helps us build scepticism which leads to testing for evidence."
Absolutely! The reason why most of us (likely) fell victim to the virulent form of xtianity that worships yhwh and his jesus sidekick, is that we lacked adequate cognitive skills. I repeat my (these days) favourite quotation:
"A student must first of all learn to doubt" (Zheng Yi, 12th Century scholar).
We all probably did have some doubts at first, but our lack of cognitive skills, meant that we were not able to truly examine what we were being taught. That was true, particularly if a relationship had been established with the person teaching us, because then we'd be affected by the "liking bias." We can easily understand the importance of that issue, as witnesses, once a HH took a dislike to us (for whatever reason) we would never be able to start a study.
And there are some outstanding examples of christian's lack of cognitive skills, currently on display in Australia's debate over the same sex marriage issue. No doubt that's because in a modern multicultural society personal views of a law giving divinity should not restrict the rights of others, So the "no" campaign does not focus on the key issue, but using a combination of the 'slippery slope' and 'red herring' fallacies, the christian side is claiming that if two people of the same sex can marry, then boys will be made to wear dresses to school. But what else would we expect christians to do?
Ruby 456: " ... I too am fascinated by human origins especially how we developed our cognitive powers. there have been many theories re this. One theory puts our ancestors as the hunted. while not taking this theory too seriously but giving it the seriousness that it deserves I can see how being prey may have caused our ancestors to develop intelligence, cunning and deception."
I'm guessing that you're referring to the dual thinking concept. That is, at one level, we make quick decisions. If that is really a predator lurking near by, our survival may depend on fast thinking - a quick response. We often see that sort of thinking by 'hunted' animals, and once one is spooked, many may also react (herd response). Young animal's may instinctively be fast thinkers. Whereas, the cultivation of good cognitive skills takes time and thought.
If this is a new thought to some, you could check out these sites. But don't just accept, consider it carefully.
and contrast these claims
http://schoolofthinking.org/2012/02/are-you-a-slow-thinker/
" ... Starting from the conflict-based I-am-right-and-you-are-wrong premise logic traps the thinker into defending his viewpoint against any suggestion of change (because “I-am-right!”). It becomes difficult, even impossible, for the thinker to escape from his own point-of-view. To think outside-the-square.
Programmed into your brain by the education system logic was designed by the Roman church for Europe and then spread around the world by missionaries. It was imported into Australia, along with rabbits, 200 years ago. Designed to defend ‘truth’ logic is driven by judgment. Once the thinker judges something as either ‘right’ or ‘wrong’ their enormous brainpower is then devoted to defending that opinion. This makes it very difficult for the thinker to escape from his opinion to find a much better one."
Which leads us into the Dunning Kruger Effect:
The entire world is currently watching the problems that can arise (as an example) when someone, say the Leader of an influential nation, has formed an opinion without considering wider aspects of an issue. So that he/she doesn't know what they don't know.