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text: 'An $n$-digit is a physical object that can be stably placed into any of $n$ distinguishable states. For example, a coin (which can be placed heads or tails) and a single bit of memory on a computer (which either has a high volt level or a low volt level) are both examples of 2-digits. A [-42d] is an example of a 10-digit. One die is an example of a 6-digit; two dice together are an example of a 36-digit (because they can be placed in 36 different ways).\n\nWhat does and doesn't count as an $n$-digit depends on context and convention: For example, if you want to communicate a message to me by placing a penny heads-side up and choosing whether to point Abraham Lincoln's face either north, south, east, or west, then, for the purposes of the two of us, that penny is a 4-digit rather than a 2-digit. The definition of "stably placed" is also a bit up-for-grabs: If you're writing a computer program and need to store a [3v9 256-message] in short-term memory, then a byte of RAM will do, but if you need to store the same 256-message for a long period of time, you may need to use a less temporary 256-digit (such as a hard drive).\n\nNote that it's possible to emulate $m$-digits using $n$-digits, in general. If $m < n$ then an $n$-digit is trivially an $m$-digit (i.e., you can use a digit wheel like a 7-digit in a pinch), and if $m > n$ then, given enough $n$-digits, you can make do. For example, 3 coins can be used to encode an 8-digit. See also [emulating_digits].',
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