Carl Hendrick restates the tired and wrong argument that critical thinking cannot be taught as a general skill. But from where I sit, if a person says critical thinking cannot be detached from context, then this tells me that the person does not understand what critical thinking is. Critical thinking is not factual recall or provision of implicit premises. It's based on form, not content. I offer more argumentation here (and I guess I'll just have to write an article or something to dispel this wrongheaded notion).