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I thought of this riddle about a year ago. As far as I am concerned there is only one answer. I would be interested to hear of anyone else's take on it.

Those who already know can't hear.
Those who can hear already know.
What do you hear?

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closed as too broad by Rosie F, Beastly Gerbil, Rand al'Thor, JMP, Aza Oct 15 '16 at 20:39

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ I hear nothing so I already know. $\endgroup$ – Ivanhoe Oct 13 '16 at 13:18
  • $\begingroup$ 'White Noise' !? $\endgroup$ – WeShall Oct 13 '16 at 15:41

10 Answers 10

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Here is my take on it. Maybe not a real answer but just an idea.

I think it is talking about

Being open or closed minded

Those who already know can't hear.

If you think you already know something you stop listening

Those who can hear already know.

If you are listening you are open minded and so you are enlightened and already know

What do you hear?

I'm listening to other people's answers because I don't think mine is right :p

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  • $\begingroup$ YES, I hear you! $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:10
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Is it:

Continuous exposure to sounds above 85 dB?

Those who already know can't hear, because they're deaf. Those who can hear, know that it's happening.

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  • $\begingroup$ I was thinking of the same thing :) $\endgroup$ – oleslaw Oct 13 '16 at 13:36
  • $\begingroup$ Those who can hear know deafness? Is that what you are saying? $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:11
  • $\begingroup$ Speak up, I can't hear you.. $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:25
  • $\begingroup$ I meant sounds loud enough to cause deafness, but sure, that too. $\endgroup$ – monoRed Oct 17 '16 at 13:11
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I can hear

The answer forming in my head

Those who already know can't hear.

If you already know the answer you can't solve it

Those who can hear already know.

I can hear it an now I know it (I hope)

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  • $\begingroup$ I like that too $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:07
  • $\begingroup$ But its not the answer $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:14
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Is it

Deafness?

Those who already know can't hear

Those who know they have deafness can't hear

Those who can hear already know.

Those who can hear already know they don't have deafness.

What do you hear?

Everything

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  • $\begingroup$ That also works $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:19
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Answer:

There are two statements about other people. And one question about me. I don't know what the others hear (and I don't care), but I hear a riddle.

It could also be something like "a surprising solution to a riddle". Those who know won't hear the surprising solution - it's not surprising as they already know. Those who hear the surprising solution have just discovered what it is, so they know now.

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  • $\begingroup$ Here's another suprise $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:19
  • $\begingroup$ Don't read the last page. $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:41
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What do you hear?

Nearby impact/explosion (e.g. of an artillery shell)? (Resulting in a tinnitus-like ringing, at least in movies).

Those who already know can't hear.

If you are near enough to the impact/explosion, you won't be able to hear, at least until your ears (brain?) recover.

Those who can hear already know.

If you are capable of hearing (that is, not deaf), then you'll experience the above effect. If you are already deaf, you may not know what happened.

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I think it could be

a spoiler

Those who already know can't hear.

if you know about something, when you hear it you aren't hearing a spoiler

Those who can hear already know.

If you can hear a spoiler, you know about it

What do you hear?

a spoiler?

Or if this was read aloud and I was thinking very literally, I might say -

"I hear a paradox about hearing and knowing... :P"

Or if I was being particularly awkward, I'd say -

"What was that?! Speak up!"

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  • $\begingroup$ OK, that sort of works. $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:09
  • $\begingroup$ By the way, you don't have to yell. $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:29
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Is it

Telepathy

Those who can hear already know.

A communication making-up in my mind, Only I know about it...so I can hear it.

Those who already know can't hear.

The person with whom I was/am having telepathy, not necessarily he/she has to think the same way, but he/she is already a part of the communication.

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  • $\begingroup$ Have you been reading my journal? $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:29
  • $\begingroup$ No......But for what??? @NONAMEBRAND $\endgroup$ – ispostback Oct 15 '16 at 18:42
  • $\begingroup$ @Grinch answered it $\endgroup$ – NO NAME BRAND Oct 15 '16 at 19:02
  • $\begingroup$ >!When someone thinks they know something they stop listening $\endgroup$ – NO NAME BRAND Oct 15 '16 at 19:04
  • $\begingroup$ >! Those who can hear ( open to learning the truth ) already know. When someone realises they don't know everything they listen. What do you hear? HERE ( On earth ) $\endgroup$ – NO NAME BRAND Oct 15 '16 at 19:06
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Maybe it's:

Tinnitus. Some believe that the sound/tone/frequency that you hear is possibly 'dying' hair cells in the cochlea. To quote a line from the Children of Men: "Julian: You know that ringing in your ears? That 'eeeeeeeeee'? That's the sound of the ear cells dying, like their swan song. Once it's gone you'll never hear that frequency again. Enjoy it while it lasts."

So

A person who has heard that, no longer can hear that frequency, and those who can still hear the frequency, can still identify the sound of that frequency. More info.

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  • $\begingroup$ So those that can hear, already know. hmm. I suppose that also works. $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:13
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Answer:

Sound of Silence

Those who already know can't hear.

when an deaf person sitting alone in a room which he knows that he hearing sound of silence.

Those who can hear already know.

when an non-deaf person sitting alone in a room which he knows that he too hearing sound of silence.

What do you hear?

Sound of Silence

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  • $\begingroup$ How do you hear silence? $\endgroup$ – NO NAME BRAND Oct 15 '16 at 13:15

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