Where in this sentence is it saying how? All I can see is the man doesn't know cooking rice? Is the how implied?
Yes of course, there isn't any confusion. I'm just trying to get more specific and wrap my mind around some concepts. I don't know the word for "how," but would it be appropriate to put it after biết in the sentence for clarification? What if the man simply doesn't know what cooking is? Or if I replaced cooking with someone's name? "The man does not know Jim.