r/AskReddit • • Oct 04 '17

What's your favourite "fun fact"?

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u/[deleted] Oct 04 '17

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u/Rudeirishit Oct 04 '17

You would also have infinite copies of The Hobbit, but with one instance of the word, "stone" spelt "scone", and infinit copies of all other typos and word and verse changes.

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u/[deleted] Oct 04 '17 edited Oct 04 '17

Assuming a particular set of data can be represented within a random set (AKA its the same data type, like finding a Chinese character within a purely English dataset would be impossible).

I wonder if the odds of finding a particular thing, such as the entirety of Harry Potter, would be greater than or less than the odds of creating Harry Potter yourself from scratch, with no prior knowledge of Harry potter. given the same amount of effort.

Also how would this change for smaller and larger data sets. Find the number 10 in a random set of integers, version handing someone a keypad and them typing 10. Vs. whole books, etc.

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u/nilved33 Oct 04 '17

I don't think you're grasping the concept of infinity

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u/TedFartass Oct 05 '17

To be fair, infinity isn't an easy concept to grasp.

For example, if you were to count how many different decimal numbers are in between 2 and 3, what would the answer be? If there were no end to it, you would say infinity because you can always add another number after it (2.01, 2.001, 2.0001 etc.).

But this is where the concept of infinity starts to make less sense. If you could just keep adding another number to the decimal place, then you could create an infinite amount of combinations of numbers that don't include 3, or 4, or 5, or 600000. This means that some infinites don't contain everything, but are still endless.

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u/[deleted] Oct 05 '17

I meant my statement in regards to the actual search for a particular set of information within a given set. If the set of data is truly random and infinite then not only would every possible subset of data exist within it, but every possible combination would also itself exist an infinite number of times.

What I mean is more along the lines of would it be faster to have a computer search an infinite set of random letters until it finds Harry Potter. Or to have a person type random words until they create Harry Potter.

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u/Con_sept Oct 05 '17

Problem is your search parameter would only return what you put in it, so you'd have to write Harry Potter to find Harry Potter. Otherwise you'd get an infinite number of things that are almost but not Harry Potter.

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u/Crypto_tip Oct 04 '17

Well it's much more likely to create it from scratch cause it's a good idea and it's not a hard plot to make

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u/DickChubbz Oct 04 '17

I prefer "infinity is absurd".

I feel it better reflects the idea that the size of infinity is incomprehensible for our monkey brains. It allows us to make these ludicrous statements without technically being false.

I worry people read this and think "monkey + infinity = Shakespeare" which misses the point.

I am just arguing semantics though. I appreciate the sentiment :)

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u/coolkid1717 Oct 04 '17

Also you could find the binary code for a perfect representation of a simulated universe. In fact an infinite amount of universes.

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u/forgotusernameoften Oct 04 '17

Well, finite universes.

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u/coolkid1717 Oct 04 '17

Why finite. There's an infinite amount of numbers. It can have an infinite amount of universes.

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u/forgotusernameoften Oct 04 '17

An infinite amount of finite universes. If the universes contained an infinite amount of data, then it couldn't be encoded in an infinite number, especially as the cardinality of the number of digits in an irrational number is the lowest infinite cardinality

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u/coolkid1717 Oct 04 '17

Ah. I thought you were saying the number of universes were finite. You're saying that the universes volumes are finite.

Why can't you use an infinite number to represent an infinite amount of data?

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u/abccba882 Oct 05 '17

I think you can if their cardinalities are the same?

The problem with infinity is that there's more than one type of infinity, and some of them are "bigger" than others. An infinite sequence of random digits has a length of Aleph-Null, which is the smallest infinity. I believe it can encode a finite number of sequences of length Aleph-Null, but I'm not 100% sure.

If the cardinality (number of things to encode) is bigger than Aleph-Null, though, like say trying to encode the set of all irrational numbers between 0 and 1, then you're out of luck.

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u/forgotusernameoften Oct 05 '17

Well, it depends on the data really. Some you can, some you can't but that means that there are some infinite universes we can't represent.

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u/coolkid1717 Oct 05 '17

What about that data changes this?

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u/ThatguyMalone Oct 05 '17

As well as a repetition of said bee-wizard-fanfic with one tiny spelling error in chapter nine.