Hello Red Red Rose, and welcome to WordReference.what the phrase "none the wiser" mean? And in what context is it generally used?
hi,It means, essentially, that someone is unaware of a circumstance or event. It's often used in a deceptive way ie:
First Person: "Let's not tell our classmate that we copied his study notes"
Second Person: "Yeah, we'll pass the test and our classmate will be none the wiser"