So how can we make a random sequence?
To make the explanation easier, we'll consider only random sequences of 0s and 1s.
To make an infinite random sequence of 0s and 1s, toss a coin infinitely many times.
Each time a heads comes up, put a 1 in the sequence. Each times tails comes up, put a 0 in the sequence.
So if the coin toss started out
heads, heads, tails, heads, tails, tails, tails, heads
the random sequence would start
11010001
Of course, computers don't toss coins, but rather generate pseudorandom numbers.
Return to Randomness.