All's not what it seems

Negative advice

Forty-eight years after being wrongly convicted of murder, a man has been exonerated by an Oklahoman judge and freed. Glynn Simmons told reporters that the decision was a lesson in resilience and tenacity, going on to say: Don't let nobody tell you that it can't happen, because it really can.

Normally, double negatives only serve to piss me off, because not only are they retarded, they reverse the intended meaning. But, in this case, it doesn't; since—despite being bastardised English—not letting nobody tell you something can't happen is similar in outcome to not letting anybody tell you so: it's gonna happen irrespectively.

It's just a pity that Mr Simmons didn't take the opportunity to get one of them there proper edumakayshuns what I've heard tell about while he was banged up. Innit?