Cool, thanks for clarifying. Please allow me to use some of your previous comments as a springboard.
I think that people often over-generalise and forget that an individual might not think so critically in one area of their life, but do think critically in other regards. Critical-thinking is certainly a skill that can be practised and improved, but the way I look at it is that most people have something to tap into. For instance, instead of simply dismissing an anti-vaccinationist as stupid or illiterate, I would try to find a way to use their current motivated skepticism on other issues that might not be so guarded by strong beliefs, then work from there.
The thing is, pretty much everyone has their own blindspots. Bill Nye was previously taking an anti-GMO stance, but could we say he lacked critical thinking? Perhaps in one way, but the main strategy was getting him to extend his critical thinking to some of his other beliefs and assumptions.
Therefore, to me, I don't think the main issue is a lack of critical thinking, but rather an issue of helping each other be more aware and conscious of our beliefs, biases, and worldviews.