Can you solve the rebel supplies riddle? - Alex Gendler

2,900,286 views

2018-09-10 ใƒป TED-Ed


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Can you solve the rebel supplies riddle? - Alex Gendler

2,900,286 views ใƒป 2018-09-10

TED-Ed


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค.

๋ฒˆ์—ญ: Chan-Hong Park ๊ฒ€ํ† : Jihyeon J. Kim
00:06
Youโ€™re overseeing the delivery of crucial supplies to a rebel base
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๋‹น์‹ ์€ ์ ๊ตญ ์‹ฌ์žฅ๋ถ€์˜ ๋ฐ˜๋ž€๊ตฐ ๊ธฐ์ง€๋กœ ๊ฐ€๋Š”
00:11
deep in the heart of enemy territory.
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์ค‘์š”ํ•œ ๋ณด๊ธ‰ํ’ˆ์„ ์ฑ…์ž„์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
00:14
To get past Imperial customs, all packages must follow a strict protocol:
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์ œ๊ตญ์˜ ์„ธ๊ด€์„ ํ†ต๊ณผํ•˜๋ ค๋ฉด ๋ชจ๋“  ๋ฌผํ’ˆ์€ ์—„๊ฒฉํ•œ ๊ทœ์น™์„ ๋”ฐ๋ผ์•ผ ํ•ฉ๋‹ˆ๋‹ค.
00:19
if a box is marked with an even number on the bottom,
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์ƒ์ž ๋ฐ”๋‹ฅ์— ์ง์ˆ˜๊ฐ€ ์ ํ˜€ ์žˆ์œผ๋ฉด
00:23
it must be sealed with a red top.
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๋นจ๊ฐ„ ๋šœ๊ป‘์„ ๋ฎ์–ด ๋ด‰์ธํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
00:27
The boxes are already being loaded onto the transport
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๋‹น์‹ ์€ ๊ธด๊ธ‰๋ฉ”์‹œ์ง€๋ฅผ ๋ฐ›์•˜์ง€๋งŒ
00:30
when you receive an urgent message.
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์ƒ์ž๋“ค์€ ์ด๋ฏธ ์ˆ˜์†ก ์ค‘์— ์žˆ์Šต๋‹ˆ๋‹ค.
00:32
One of the four boxes was sealed incorrectly,
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๋„ค ๊ฐœ์˜ ์ƒ์ž ์ค‘ ํ•˜๋‚˜๊ฐ€ ์ž˜๋ชป ๋ด‰์ธ๋˜์—ˆ์ง€๋งŒ
00:36
but they lost track of which one.
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์–ด๋–ค ๊ฒƒ์ธ์ง€๋Š” ๋ชจ๋ฆ…๋‹ˆ๋‹ค.
00:38
All the boxes are still on the conveyor belt.
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๋ชจ๋“  ์ƒ์ž๊ฐ€ ์•„์ง ์ปจ๋ฒ ์ด์–ด ๋ฒจํŠธ์— ์žˆ์Šต๋‹ˆ๋‹ค.
00:41
Two are facing down: one marked with a four,
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๋‘ ๊ฐœ๋Š” ๋’ค์ง‘ํ˜€์ ธ ๋ฐ”๋‹ฅ์„ ํ–ฅํ•˜๊ณ  ์žˆ๋Š”๋ฐ ํ•˜๋‚˜๋Š” 4๊ฐ€ ์ ํ˜€ ์žˆ๊ณ ,
00:45
and one with a seven.
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๋‹ค๋ฅธ ํ•˜๋‚˜๋Š” 7์ด ์ ํ˜€ ์žˆ์Šต๋‹ˆ๋‹ค.
00:46
The other two are facing up:
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๋‚˜๋จธ์ง€ ๋‘ ๊ฐœ๋Š” ์œ„๋ฅผ ํ–ฅํ•˜๊ณ  ์žˆ๋Š”๋ฐ
00:48
one with a black top,
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ํ•˜๋‚˜๋Š” ๊ฒ€์€ ๋šœ๊ป‘์ด๊ณ ,
00:49
another with a red one.
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๋‹ค๋ฅธ ํ•˜๋‚˜๋Š” ๋นจ๊ฐ„ ๋šœ๊ป‘์ž…๋‹ˆ๋‹ค.
00:52
You know that any violation of the protocol
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๊ทœ์น™์„ ํ•˜๋‚˜๋ผ๋„ ์–ด๊ธฐ๋ฉด ๋ชจ๋“  ํ™”๋ฌผ์€ ์••์ˆ˜๋‹นํ•˜๊ณ 
00:54
will get the entire shipment confiscated and put your allies in grave danger.
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ํ˜‘๋ ฅ์ž๋“ค์€ ํฐ ์œ„ํ—˜์— ๋น ์ง„๋‹ค๋Š” ๊ฒƒ์„ ๋‹น์‹ ์€ ์ž˜ ์•Œ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
01:00
But any boxes you pull off for inspection wonโ€™t make it onto this delivery run,
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ํ•˜์ง€๋งŒ ๊ฒ€์‚ฌํ•˜๊ธฐ ์œ„ํ•ด ์ƒ์ž๋ฅผ ๋บ€๋‹ค๋ฉด ๊ทธ ์ƒ์ž๋Š” ์ „๋‹ฌ๋˜์ง€ ๋ชปํ•˜๊ณ ,
01:05
depriving the rebels of critically needed supplies.
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๋ฐ˜๋ž€๊ตฐ์€ ๊ผญ ํ•„์š”ํ•œ ๋ณด๊ธ‰ํ’ˆ์„ ๋ฐ›์ง€ ๋ชปํ•˜๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
01:09
The transport leaves in a few moments, with or without its cargo.
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ํ™”๋ฌผ์ด ์žˆ๋“  ์—†๋“  ์ˆ˜์†ก์ฐจ๋Ÿ‰์€ ๋ช‡ ๋ถ„ ํ›„ ์ถœ๋ฐœํ•ฉ๋‹ˆ๋‹ค.
01:13
Which box or boxes should you grab off the conveyor belt?
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๋‹น์‹ ์€ ์–ด๋–ค ์ƒ์ž๋ฅผ ์ปจ๋ฒ ์ด์–ด ๋ฒจํŠธ์—์„œ ๋นผ๊ฒ ์Šต๋‹ˆ๊นŒ?
01:18
Pause the video now if you want to figure it out for yourself!
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์Šค์Šค๋กœ ์ •๋‹ต์„ ๋งž์ถ”๋ ค๋ฉด ์ง€๊ธˆ ์˜์ƒ์„ ์ž ๊น ๋ฉˆ์ถ”์„ธ์š”.
01:23
Answer in: 3
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์ •๋‹ต 3์ดˆ ์ „
01:25
Answer in: 2
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์ •๋‹ต 2์ดˆ ์ „
01:26
Answer in: 1
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์ •๋‹ต 1์ดˆ ์ „
01:27
It may seem like you need to inspect all four boxes
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๋ฐ˜๋Œ€์ชฝ์„ ํ™•์ธํ•˜๋ ค๋ฉด ์ƒ์ž ๋„ค ๊ฐœ ๋ชจ๋‘๋ฅผ
01:31
to see whatโ€™s on the other side of each.
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๊ฒ€์‚ฌํ•ด์•ผ ํ•œ๋‹ค๊ณ  ์ƒ๊ฐํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
01:33
But in fact, only two of them matter.
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๊ทธ๋ ‡์ง€๋งŒ ์‚ฌ์‹ค ๋‘ ๊ฐœ๋ฉด ์ถฉ๋ถ„ํ•ฉ๋‹ˆ๋‹ค.
01:36
Letโ€™s look at the protocol again.
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๊ทœ์น™์„ ๋‹ค์‹œ ๋ณด์ฃ .
01:38
All it says is that even-numbered boxes must have a red top.
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์ง์ˆ˜๊ฐ€ ์ ํžŒ ์ƒ์ž๋Š” ๋ชจ๋‘ ๋นจ๊ฐ„ ๋šœ๊ป‘์œผ๋กœ ๋ด‰์ธํ•ด์•ผ ํ•œ๋‹ค๊ณ  ํ–ˆ์ฃ .
01:42
It doesnโ€™t say anything about odd-numbered boxes,
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ํ™€์ˆ˜๊ฐ€ ์ ํžŒ ์ƒ์ž์— ๋Œ€ํ•ด์„œ๋Š” ์–ธ๊ธ‰์ด ์—†์Šต๋‹ˆ๋‹ค.
01:45
so we can just ignore the box marked with a seven.
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๋”ฐ๋ผ์„œ 7์ด ์ ํžŒ ์ƒ์ž๋Š” ๋ฌด์‹œํ•ด๋„ ๋˜๊ฒ ์ฃ .
01:48
What about the box with a red top?
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๋นจ๊ฐ„ ๋šœ๊ป‘์ด ์žˆ๋Š” ์ƒ์ž๋Š” ์–ด๋–จ๊นŒ์š”?
01:51
Donโ€™t we need to check that the number on the bottom is even?
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๋ฐ”๋‹ฅ์— ์ง์ˆ˜๊ฐ€ ์ ํ˜”๋Š”์ง€ ํ™•์ธํ•  ํ•„์š”๊ฐ€ ์žˆ์„๊นŒ์š”?
01:54
As it turns out, we donโ€™t.
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์•„์‹œ๋‹ค์‹œํ”ผ ๊ทธ๋Ÿด ํ•„์š” ์—†์Šต๋‹ˆ๋‹ค.
01:56
The protocol says that if a box has an even number,
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๊ทœ์น™์— ๋”ฐ๋ฅด๋ฉด ์ง์ˆ˜๊ฐ€ ์ ํžŒ ์ƒ์ž๋Š”
02:00
then it should have a red top.
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๋นจ๊ฐ„ ๋šœ๊ป‘์„ ์‚ฌ์šฉํ•˜๊ธฐ ๋•Œ๋ฌธ์ด์ฃ .
02:02
It doesnโ€™t say that only boxes with even numbers can have red tops,
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๋‹ค๋ฅธ ๋ฐฉ์‹์œผ๋กœ ์ƒ๊ฐํ•˜๋ฉด ์ง์ˆ˜๊ฐ€ ์ ํžŒ ์ƒ์ž๋งŒ ๋นจ๊ฐ„ ๋šœ๊ป‘์„ ๋ฎ๊ฑฐ๋‚˜
02:07
or that a box with a red top must have an even number.
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๋นจ๊ฐ„ ๋šœ๊ป‘์ด ๋ฎํžŒ ์ƒ์ž์— ์ง์ˆ˜๋งŒ ์ ์–ด์•ผ ํ•œ๋‹ค๋Š” ๋ง์€ ์•„๋‹™๋‹ˆ๋‹ค.
02:11
The requirement only goes in one direction.
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๊ทœ์น™์€ ํ•˜๋‚˜์˜ ๊ฒฝ์šฐ๋งŒ ์–˜๊ธฐํ•˜๊ณ  ์žˆ์ฃ .
02:15
So we donโ€™t need to check the box with the red lid.
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๊ทธ๋Ÿฌ๋‹ˆ ๋นจ๊ฐ„ ๋šœ๊ป‘์ด ์žˆ๋Š” ์ƒ์ž๋ฅผ ํ™•์ธํ•  ํ•„์š”๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.
02:17
We do, however, need to check the one with the black lid,
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ํ•˜์ง€๋งŒ ๊ฒ€์€ ๋šœ๊ป‘์ด ์žˆ๋Š” ์ƒ์ž๋Š” ํ™•์ธํ•ด๋ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
02:21
to make sure it wasnโ€™t incorrectly placed on an even-numbered box.
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์ง์ˆ˜๊ฐ€ ์ ํžŒ ์ƒ์ž์— ์ž˜๋ชป ๋ฎ์€ ๊ฑธ ์ˆ˜๋„ ์žˆ์œผ๋‹ˆ๊นŒ์š”.
02:26
If you initially assumed the rules imply a symmetrical match
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์•„๋งˆ ์ฒ˜์Œ์— ๊ทœ์น™์ด ์ƒ์ž์— ์“ฐ์ธ ์ˆซ์ž์™€ ๋šœ๊ป‘ ์ข…๋ฅ˜๊ฐ„
02:30
between the number on the box and the type of lid, youโ€™re not alone.
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์ƒํ˜ธ๋Œ€์นญ์ ์œผ๋กœ ์ ์šฉ๋œ๋‹ค๊ณ  ์ž˜๋ชป ์ƒ๊ฐํ–ˆ๊ฒ ์ง€๋งŒ ๊ดœ์ฐฎ์Šต๋‹ˆ๋‹ค.
02:33
That error is so common, we even have a name for it:
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๊ทธ๋Ÿฐ ์‹ค์ˆ˜๋Š” ์•„์ฃผ ํ”ํ•ด์„œ ๋”ฐ๋กœ ์šฉ์–ด๊ฐ€ ์žˆ์„ ์ •๋„์ž…๋‹ˆ๋‹ค.
02:37
affirming the consequent,
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ํ›„๊ฑด ๊ธ์ •์˜ ์˜ค๋ฅ˜,
02:39
or the fallacy of the converse.
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๋˜๋Š” ๊ตฌ์„ฑ์˜ ์˜ค๋ฅ˜๋ผ๊ณ  ํ•ฉ๋‹ˆ๋‹ค
02:42
This fallacy wrongly assumes
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์ด ์˜ค๋ฅ˜๋Š” ํŠน์ •ํ•œ ๊ฒฐ๋ก ์ด ์„ฑ๋ฆฝํ•˜๊ธฐ ์œ„ํ•ด์„ 
02:44
that just because a certain condition is necessary for a given result,
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์–ด๋–ค ํ•œ ์กฐ๊ฑด์ด ํ•„์ˆ˜์ ์ด๋ฉฐ ๊ทธ๊ฒƒ๋งŒ์œผ๋กœ๋„ ์ถฉ๋ถ„ํ•˜๋‹ค๊ณ 
02:48
it must also be sufficient for it.
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์ž˜๋ชป ์ƒ๊ฐํ•˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:51
For instance, having an atmosphere is a necessary condition
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๊ฐ€๋ น, ํ–‰์„ฑ์— ์ƒ๋ช…์ฒด๊ฐ€ ์‚ด๋ ค๋ฉด
02:54
for being a habitable planet.
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๋Œ€๊ธฐ๊ฐ€ ํ•„์ˆ˜์ ์œผ๋กœ ์žˆ์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
02:56
But this doesnโ€™t mean that itโ€™s a sufficient condition โ€“
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ํ•˜์ง€๋งŒ ๊ทธ๊ฒƒ์ด ์ถฉ๋ถ„์กฐ๊ฑด์ธ ๊ฒƒ์€ ์•„๋‹™๋‹ˆ๋‹ค.
02:59
planets like Venus have atmospheres but lack other criteria for habitability.
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๊ธˆ์„ฑ์€ ๋Œ€๊ธฐ๊ฐ€ ์žˆ์ง€๋งŒ ๋‹ค๋ฅธ ๊ธฐ์ค€์€ ์ถฉ์กฑํ•˜์ง€ ๋ชปํ•ฉ๋‹ˆ๋‹ค.
03:05
If that still seems hard to wrap your head around,
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์•„์ง ์ดํ•ดํ•˜๊ธฐ ์–ด๋ ต๋‹ค๋ฉด,
03:08
letโ€™s look at a slightly different problem.
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์กฐ๊ธˆ ๋‹ค๋ฅธ ์˜ˆ๋ฅผ ์‚ดํŽด๋ณด์ฃ .
03:11
Imagine the boxes contain groceries.
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์ƒ์ž๋“ค ์•ˆ์— ์‹๋ฃŒํ’ˆ์ด ์žˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•ฉ์‹œ๋‹ค.
03:13
You see one marked for shipment to a steakhouse
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ํ•˜๋‚˜๋Š” ์ •์œก์ ์œผ๋กœ ๋ฐฐ์†ก๋œ๋‹ค๋Š” ํ‘œ์‹œ๊ฐ€ ์žˆ๊ณ 
03:16
and one to a vegetarian restaurant.
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๋‹ค๋ฅธ ํ•˜๋‚˜๋Š” ์•ผ์ฑ„๊ฐ€๊ฒŒ๊ฐ€ ํ‘œ์‹œ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
03:19
Then you see two more boxes turned upside down:
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๊ทธ๋ฆฌ๊ณ  ๋’ค์ง‘์–ด์ ธ ์žˆ๋Š” ์ƒ์ž ๋‘ ๊ฐœ๊ฐ€ ๋˜ ์žˆ์Šต๋‹ˆ๋‹ค.
03:22
one labeled as containing meat,
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ํ•˜๋‚˜๋Š” ๊ณ ๊ธฐ๊ฐ€ ๋“ค์—ˆ๋‹ค๋Š” ํ‘œ์‹œ๊ฐ€ ์žˆ๊ณ 
03:24
and another as containing onions.
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๋‹ค๋ฅธ ํ•˜๋‚˜๋Š” ์–‘ํŒŒ๊ฐ€ ๋“ค์—ˆ๋‹ค๋Š” ํ‘œ์‹œ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
03:26
Which ones do you need to check?
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์ด ์ค‘์— ์–ด๋–ค ๊ฑธ ํ™•์ธํ•˜์‹œ๊ฒ ์Šต๋‹ˆ๊นŒ?
03:29
Well, itโ€™s easy โ€“
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๊ฐ„๋‹จํ•ฉ๋‹ˆ๋‹ค.
03:30
make sure the meat isnโ€™t being shipped to the vegetarian restaurant,
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๊ณ ๊ธฐ๋Š” ์•ผ์ฑ„๊ฐ€๊ฒŒ๋กœ ๋ฐฐ์†ก๋˜์ง€ ์•Š๊ณ ,
03:33
and that the box going there doesnโ€™t contain meat.
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์•ผ์ฑ„๊ฐ€๊ฒŒ๋กœ ๊ฐ€๋Š” ์ƒ์ž์—๋Š” ๊ณ ๊ธฐ๊ฐ€ ์—†๋‹ค๋Š” ๊ฑธ ๋ช…์‹ฌํ•˜์„ธ์š”.
03:37
The onions can go to either place,
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์–‘ํŒŒ๋Š” ์–ด๋””๋กœ๋“  ๋ฐฐ์†ก๋  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์—
03:39
and the box bound for the steakhouse can contain either product.
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์ •์œก์  ํ‘œ์‹œ๊ฐ€ ๋˜์–ด ์žˆ๋Š” ์ƒ์ž์—” ๊ณ ๊ธฐ์™€ ์–‘ํŒŒ ๋‘˜ ๋‹ค ์žˆ์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
03:43
Why does this scenario seem easier?
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์™œ ์ด ์‚ฌ๋ก€๊ฐ€ ๋” ์ดํ•ดํ•˜๊ธฐ ์‰ฌ์šธ๊นŒ์š”?
03:45
Formally, itโ€™s the same problem โ€“
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์‚ฌ์‹ค, ๊ฐ™์€ ๋ฌธ์ œ์ž…๋‹ˆ๋‹ค.
03:47
two possible conditions for the top of the box,
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๋‘ ๊ฐ€์ง€ ๊ฒฝ์šฐ์˜ ์ˆ˜๊ฐ€ ์ƒ์ž ๋šœ๊ป‘์—๋„,
03:50
and two for the bottom.
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์ƒ์ž ๋ฐ”๋‹ฅ์—๋„ ์ ์šฉ๋ฉ๋‹ˆ๋‹ค.
03:51
But in this case, theyโ€™re based on familiar real-world needs,
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ํ•˜์ง€๋งŒ ์ด ๊ฒฝ์šฐ์—” ์šฐ๋ฆฌ์—๊ฒŒ ์นœ์ˆ™ํ•œ ์‹ค์ œ์ƒํ™ฉ์— ๋น—๋Œ€์—ˆ๊ธฐ ๋•Œ๋ฌธ์—,
03:55
and we easily understand that while vegetarians only eat vegetables,
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์ฑ„์‹์ฃผ์˜์ž๋“ค์ด ์ฑ„์†Œ๋งŒ ๋จน๋Š”๋‹ค๊ณ  ํ•ด์„œ ๊ผญ ๊ทธ๋“ค๋งŒ ์ฑ„์†Œ๋ฅผ ๋จน๋Š” ๊ฒŒ ์•„๋‹˜์„
03:59
theyโ€™re not the only ones who do so.
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์‰ฝ๊ฒŒ ์ดํ•ดํ•  ์ˆ˜ ์žˆ๋Š” ๊ฒ๋‹ˆ๋‹ค.
04:02
In the original problem, the rules seemed more arbitrary,
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๋ณธ๋ž˜ ๋ฌธ์ œ์—์„  ๊ทœ์น™์ด ๋” ์ž„์˜์ ์ธ ๊ฒƒ ๊ฐ™๊ณ ,
04:05
and when theyโ€™re abstracted that way,
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๊ฑฐ๊ธฐ์— ์ง‘์ฐฉํ•˜๊ฒŒ ๋ผ
04:08
the logical connections become harder to see.
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๋…ผ๋ฆฌ์  ์—ฐ๊ฒฐ์ด ๋”์šฑ ์–ด๋ ต๊ฒŒ ๋Š๊ปด์ง€๋Š” ๊ฒ๋‹ˆ๋‹ค.
04:11
In your case, youโ€™ve managed to get enough supplies through
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๋‹น์‹ ์€ ๋ฐ˜๋ž€๊ตฐ์ด ๊ณ„์† ์‹ธ์šธ ์ˆ˜ ์žˆ๋„๋ก
04:14
to enable the resistance to fight another day.
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๊ฐ€๊นŒ์Šค๋กœ ์ถฉ๋ถ„ํ•œ ๋ณด๊ธ‰ํ’ˆ์„ ๋ณด๋‚ผ ์ˆ˜ ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค.
04:17
And you did it by thinking outside the box โ€“
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๊ทธ๊ฒƒ๋„ ์ƒ์ž๋ฅผ ๊ฒ‰์—์„œ ์–‘์ชฝ ๋ฉด๋งŒ ๋ณด๊ณ ๋„ ํ•  ์ˆ˜ ์žˆ์—ˆ๋˜ ๊ฑฐ์ฃ .
04:20
both sides of it.
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์ด ์›น์‚ฌ์ดํŠธ ์ •๋ณด

์ด ์‚ฌ์ดํŠธ๋Š” ์˜์–ด ํ•™์Šต์— ์œ ์šฉํ•œ YouTube ๋™์˜์ƒ์„ ์†Œ๊ฐœํ•ฉ๋‹ˆ๋‹ค. ์ „ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์„ ์ƒ๋‹˜๋“ค์ด ๊ฐ€๋ฅด์น˜๋Š” ์˜์–ด ์ˆ˜์—…์„ ๋ณด๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ ๋™์˜์ƒ ํŽ˜์ด์ง€์— ํ‘œ์‹œ๋˜๋Š” ์˜์–ด ์ž๋ง‰์„ ๋”๋ธ” ํด๋ฆญํ•˜๋ฉด ๊ทธ๊ณณ์—์„œ ๋™์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋น„๋””์˜ค ์žฌ์ƒ์— ๋งž์ถฐ ์ž๋ง‰์ด ์Šคํฌ๋กค๋ฉ๋‹ˆ๋‹ค. ์˜๊ฒฌ์ด๋‚˜ ์š”์ฒญ์ด ์žˆ๋Š” ๊ฒฝ์šฐ ์ด ๋ฌธ์˜ ์–‘์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์˜ํ•˜์‹ญ์‹œ์˜ค.

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