Be none the wiser/no wiser noun phrase
To not realize or discover that somebody has done something wrong.
There was someone eavesdropping on me outside the window, but I was none the wiser until I rewatch the camera.
They swindled him out of hundreds of dollars by novel and devious methods, so it is understandable why he was no wiser.
To not come to understand something though it has been described and given information to you.
Probably, the way you elaborate on this matter is not good enough so I am none the wiser.
John gets frustrated after the third time elucidating this grammar point to his daughter, but she is still no wiser.
Be ignorant, innocent or totally unaware; not know what's what
To be so confused that one is unaware of one's actions
Used to describe that you are unaware of something or do not find an answer to something.
To be not aware of one's surroundings or behave oddly.
This phrase dates back to the early 1800s.