Get all the numbers from 0-1.
For each number, double it’s (e.g. 0.25 becomes 0.5, and pi/4 becomes pi/2, and .99 becomes 1.98, etc).
You now have all the numbers between 0-2.
Doubling the value of a number still results in a single number.
So this process has not change how many numbers we had.
Therefore, 0-1 and 0-2 have the same amount of numbers.
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