To be considered knowledgeable, all you need to do is remember what you learn, understand what you learn, and then apply what you learn.
I agree with Sean’s critique here insofar as he’s - to my reading - warning against a vision of learning that’s more concerned with mass complacency than individual critical thinking. Yet I find Bloom’s Taxonomy to be a helpful launch point. For instance, I think it’s important for teachers to help students remember what they’ve previously learned in order to build on that knowledge. I think building knowledge does require recall; otherwise, new information remains in isolation. The problem arises when teachers and students alike do not engage in the more complex acts of analyzing and evaluating. For me, when I’m (co)designing a lesson, I return to Bloom not as a tablet delivered from on high, but as a taxonomy of possibility, a collection of verbs that stimulates my own thinking about the types of learning that might happen in a certain class with a specific set of students.