Cybermorphic,
Your CNN example is interesting.
Suppose we look at just one pixel on the screen at regular intervals, and use, say, its red saturation value (between 0 and 255) to generate "random" numbers. Are these numbers truly random?
You would clearly argue that they are not. The image on CNN at any time is determined by human beings. Therefore, the red value of pizel number 65342 at any time depends on previous decisions that human beings have made about what will be on the screen at any time.
But, if you were given the output of pixel number 65342 over the period of, say, 10 minutes, with samples taken every 10 seconds from CNN, could you find a pattern? Perhaps you could. Perhaps CNN would be mostly showing a news reader over that time, and all the red values were showing the colour of his suit over virtually the whole time.
What if you took samples over 24 hours? Would you be able to pick a pattern?
Also, going back to the newsreader, if you were given a list of numbers such as 132, 133, 132, 134, 135, 132, 132, 132, 140, ... would you ever be able to say "Ah, yes, sounds like the 6pm news bulletin on CNN!" I don't think so.
The thing is: it depends on how you choose to define "random". You seem to want to define "random" as equivalent to "uncaused by anything". If that is your definition, few things will ever be random to you, because most things have some kind of cause. CNN is caused, so nothing derived from it is random, as far as you are concerned.
In my opinion, a much better definition of "random" is "unpredictable". The red value of pixel 65342 on CNN over any reasonable length of time is unpredictable, <b>even if it is ultimately caused by something</b>. If I knew the programming in detail for CNN for today, I could, in principle, predict that the red saturation level of pixel 65342 at 5 pm would be between 130 and 160, or something. But, in fact, I would have to go to a great deal of trouble to predict that. For all intents and purposes, it is a random number (except over short times).
When it comes to radioactive decays, as I mentioned before, there is <b>nothing</b> you can do to tell me how many counts a radioactive source will emit between 5 pm and 6 pm, at least beyond a certain accuracy limited by statistics.
Both CNN and radioactive decay are random.