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B1 متوسط انگلیسی 11:32 Educational

Is Anything Real?

Vsauce · 23,297,199 بازدید · اضافه شده 3 روز پیش

آمار یادگیری

B1

سطح CEFR

5/10

سختی

زیرنویس‌ها (183 بخش‌ها)

00:00

Hey, Vsauce. Michael here. Where are your fingers?

00:05

Seriously. It's a pretty easy question. You should be able to answer it.

00:10

But how do you know? How does

00:13

anyone know anything? You might say, well, I know where my fingers are. I'm looking

00:18

right at them.

00:19

Or, I can touch them, I can feel them, they're right here and that's good.

00:23

Your senses are a great way to learn things.

00:26

In fact, we have way more than the usual five senses we talk about.

00:30

For instance, your kinesthetic sense, proprioception.

00:35

This is what the police evaluate during a field sobriety test.

00:39

It allows you to tell where your fingers and arms and head and legs in your body

00:43

is all in relation to each other

00:44

without having to look or touch other things.

00:48

We have way more than five senses, we have at least twice as many

00:52

and then some. But they're not perfect. There are optical illusions,

00:57

audio illusions,

01:01

temperature sensation illusions, even tactile

01:04

illusions. Can you turn your tongue upside down?

01:08

If so, perfect. Try this. Run your finger

01:11

along the outer edge of the tip of your upside down

01:15

tongue. Your tongue will be able to feel your finger, but in the wrong place.

01:19

Our brains never needed to develop an understanding

01:23

of upside down tongue touch. So, when you touch the right side of your tongue

01:27

when it's flipped over to your left side you perceive a sensation

01:32

on the opposite side, where your tongue usually is but isn't

01:36

when it's upside down. It's pretty freaky and cool

01:39

and a little humbling, because it shows the limits of the

01:43

accuracy of our senses, the only tools we have to get what's out there

01:49

in here. The philosophy of knowledge,

01:53

the study of knowing, is called Epistomology.

01:57

Plato famously said that the things we know

02:01

are things that are true, that we believe

02:04

and that we have justification for believing. those justifications might be

02:08

irrational

02:09

or they might be rational, they might be based on proof,

02:13

but don't get too confident because proven is not a synonym

02:17

for true. Luckily, there are things that we can know

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