"discerning knowledge" is correct and usable in written English.
You can use it to describe someone with understanding and insight, particularly on a particular subject or area of expertise. For example: "John is well known for his discerning knowledge of mathematics."
It would provide us with what television debates promised but never delivered: a way to discern the knowledge, intentions and character of a potential president.
If you are aware that the person offering "criticism" lacks the skill or knowledge, be discerning and realistic about just how much this person does know.
Tony is eminent in the fashion world because he has that depth of knowledge and a discerning eye, and that's because he's familiar with how well those old designers cut cloth.
Such knowledge is useful in discerning types of graphite surfaces are exposed when nanostructured carbons are used as catalysts and catalyst supports.
A Stanford professor named Pam Grossman is now trying to articulate a similar body of knowledge for English teachers, discerning what kinds of questions to ask about literature and how to lead a group discussion about a book.
But the future of search is verbs — computationally discerning user intent to give them the knowledge to complete tasks".
He was renowned for his discerning eye as well as his wide-ranging knowledge.
As collectors recognized her discerning eye, extraordinary expertise, willingness to share her knowledge, and sound advice, the business grew and led to the establishment of a series of galleries on Madison Avenue.
A difficulty encountered in discerning mechanisms of this airway disease is the lack of knowledge of the active components of these dusts.
Even experts need time and knowledge to discern which of the ingredients in these lists are harmful for human health or the environment [4].
