Guy Threepwood
Mighty Pirate
Also, even with the brain capacity to deal with abstract thoughts and reasoning, a person needs to be trained in a sense in doing so, by their social interactions. We have a certain ability in our brain, but that's just the platform. It's very important to imprint the actual experience in a child growing up to use their reasoning and abstractions, or it won't work. I've noticed that there are quite many humans I've met and discussed with who has very limited ability to reason or think in abstractions. It might be something lacking physically or biologically, but I suspect it's also upbringing.
It's also a common mistake to assume intellectual superiority over people with different beliefs. That's why acknowledging personal faith in our beliefs is important. The wise man knows himself a fool