Villa have netted only 12 times in 16 Barclays Premier League games and even the reintroduction of Bent as a second-half substitute failed to spark a breakthrough against the Potters.
When asked whether Bent's presence would improve the goal tally, Lambert said: "Listen, I'm going to stop you. I ain't answering any more questions on it.
"I told you, I answered about 305 the other night. I'm not answering anymore."