Pundit and former Liverpool player Lawrenson made his observation in an interview on an Irish radio station on Friday.
Given Lawrenson knows Moyes through a connection at Preston, the comments were noteworthy, even if United privately distanced themselves from them.
However, offered the opportunity to respond following Saturday's 1-0 home defeat by Newcastle, when Van Persie returned from a groin injury after a four-match absence, Moyes did not mince his words.
"That is absolute nonsense," said Moyes.
"I don't know what harder or tougher word I could say but that's as good as I've got."
Arsenal fans. Got news for you. Ur not going to win the Prem so why would he go back to you. Also you don't have a striker better than him in ur squad. You need him more than he needs you otherwise you idiots would not be commenting "wish he didn't leave Arsenal now blah blah blah".- redmachine01