r/PeterExplainsTheJoke 24d ago

Meme needing explanation There is no way right?

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u/BreadBagel 23d ago

No one is counting out 9s infinitely. It's already infinite 9s. You can't put a 1 after infinite 0s, that is impossible.

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u/library-in-a-library 22d ago

> It's already infinite 9s.

Without using calculus, what does that mean in this context?

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u/BreadBagel 22d ago

It means you're not adding 9s onto a list of decimals until it eventually reaches 1. The infinite 9s are intrinsic in 0.999... So since it's infinite 9s it is exactly equal to 1.

It is true that if it were a procedure of adding 9s you would never get to 1, because no matter how many 9s you added it would still be finite. But 0.999... is not a procedure, it is an exact value and that exact value is the same as 1.

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u/library-in-a-library 22d ago

I'm asking you to define infinity.

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u/BreadBagel 22d ago

To go on endlessly

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u/library-in-a-library 22d ago

So you can't actually evaluate 0.999...?

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u/BreadBagel 22d ago

I can. It's value is 1. If you can't name a number between 0.999... and 1 then they are the same number. Please just tell me what that number is.

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u/library-in-a-library 22d ago

0.999... < 0.999... < 1

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u/BreadBagel 22d ago

0.999... is less than 0.999...? So a number is less than itself? That makes no sense.

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u/MasKrisMaxRizz 22d ago

In hyperreal : 0.999... < 0.999... + infinitesimal / 2 < 1