If you ask me if I've chosen somebody to fill a position and I say, "Yes, I'm going to name him later", it's understood that I've chosen somebody.
However, if you're asked: "Are you prepared to name a candidate for a position?"
and respond with: "I'm prepared to do that. I tell you, we don't really need to fill that position." Then you didn't actually answer the question.
What "right wing violence"? Does Gropin' Joe have an obligation to condemn "left wing violence"?
The questions were based off of comments each candidates had made. Here was the exchange which Biden was asked a similar (definitely not the same):
At about 1:02:50
Wallace: Gentleman, I’m gonna take back control. And I want to get to another subject, which is the issue of protests in many cities that have turned violent. In Portland, Oregon, especially, we had more than 100 straight days of protests, which I think you would agree about peaceful protests. Many of those turned into riots. Mr. Vice President, you say that people who commit crimes should be held accountable. The question I have though is as the Democratic nominee, and earlier tonight you said that you are the Democratic Party right now. Have you ever called the Democratic mayor of Portland the Democratic governor of Oregon and said ‘Hey, you gotta stop this. Bring in the National Guard. Do whatever it takes. That you'd stop the days and months of violence in Portland?
Biden: I don't hold public office now. I am a former Vice President. I've made it clear, I've made it clear in my public statements that the violence should be prosecuted. Anyone who committed it --
Wallace: But you've never called for the people- Excuse me, sir. You’ve never called for the leaders in Portland, and in Oregon, to call in the national office and knock off 100 days of riots.
Biden: They can, in fact, take care of it if he’d just stay out of the way. Look-
Trump: Oh really? Oh really? -- The killer of a young man in the middle of the street and they shot him. For three days Portland didn’t do anything.
Wallace: President Trump. President Trump. I interrupt- President Trump
Of course, unlike Trump's response, Biden was interrupted by Trump and it wasn't allowed to finish. He did, however, make a wholly unconditioned "I've made it clear in my public statements that the violence should be prosecuted."