Quote - If you could program a computer to simulate the action of one of those lottery machines that drops numbered ping-pong balls into a chute, wouldn't that be random?

No because the numbers they use are not infinite, they are fixed so the computer is told pick number between 1 through number(x)  with a condition that it cannot pick the same number twice with in that series.

Even the machine that drops the ping pong balls does so not randomly due to it has only a finite numbers to pick from.

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