Cartoon Network was not the first cable channel to have relied on cartoons to attract an audience; however, it was the first 24-hour single-genre channel with animation as its main theme. Turner Broadcasting System had defied conventional wisdom before by launching CNN, a channel providing 24-hour news coverage. The concept was previously thought unlikely to attract a sufficient audience to be particularly profitable, however the CNN experiment had been successful and Turner hoped that Cartoon Network would also find success.