On Thursday, when asked by reporters, Yang seemed to know little about 50-a, police policy that kept disciplinary records secret.
He was also confused about the city's chokehold policy and he stumbled at a forum on homeless issues.
"One thing I think would be extraordinarily helpful is to have specific shelters for victims of domestic violence, Yang said.
We already have shelters for homeless domestic violence victims.
On Friday, Yang told Eyewitness News reporter Dave Evans that he's well prepared and polls show he remains popular.
"If you dig into it again we have very detailed policy proposals," Yang said. "New Yorkers know we need a different approach to get our city on its feet than politics as usual. We need a different form of leadership."
A Twitter feed has been set up specifically to ridicule Yang.
Another Twitter account pokes fun at Yang not knowing what New York already has.
Maya Wiley never mentioned yang by name Friday, but she said qualifications matter.
Scott stringer said no candidate should be so ignorant about the city.
Mayor Bill de Blasio also seemed to take a dig.
"Because the next mayor is going to have to navigate a very challenging environment and they better damn well understand how New York City works," de Blasio said.
On Friday, a new TV ad began airing, but it's paid for not by Yang, but by an outside group.
We will see a lot of Yang in the next 30 days, but for New York the question remains is he ready?
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