# Is there any empirical evidence that x(y + z) = xy + yz? if not, then how do we...

Spamalot

is there any empirical evidence that x(y + z) = xy + yz? if not, then how do we know that it's true?

cum2soon

if not, then how do we know that it's true?
It's not.

likme

@cum2soon
This.

Whereas x(y + z) = xy + xz is, tho.

Carnalpleasure

@likme
Whereas x(y + z) = xy + xz is, tho.
That's not true either.

StrangeWizard

@Spamalot
empirical

Supergrass

@Spamalot
You can test it as much as you like with different numbers, so yeah, there is empirical evidence. Proofs is still better though.

Techpill

@Carnalpleasure
It is.

http://www.wolframalpha.com/input/?i=x(y+%2B+z)+%3D+xy+%2B+xz

Methnerd

@Spamalot
I want to bite the hook guys. I wanna bite so bad.

TurtleCat

@Spamalot
Well it depends on how you use distribution
if you try and find evidence in a system that uses such mathematical structure that doesn't allow for distribution than you will not be able to find any evidence. If you however use it in a structure that does allow, you will find plenty

Maths is just an abstraction anyways, you don't need empirical evidence for something to be true. Distribution is true because we define it that way. 1+1 = 1 is true if I define it + that way in a mathematical structure, it is true because I say so. And bonus, I can find empirical evidence
a rain drop + a rain drop = a rain drop
1+1 = 1
empirically proven

Learn algebra you fucking twat

StonedTime

@TurtleCat
forgot to add the picture

WebTool

@Techpill
http://www.wolframalpha.com/input/?i=x(y+%2B+z)+%3D+xy+%2B+xz
Output from a closed source CAS is not an argument.

whereismyname

xy = (x/y)y

CouchChiller

i am a mathematics major and have learned math, just why should i take it at face value that x(z + y) = xd + zy? how could we possibility know that without having a repeatable experiment that demonstrates the result?

DeathDog

Science & Math board
People think math is a science

TechHater

if math isn't science, then what is it?

New_Cliche

@TechHater
Philosophy

Playboyize

@StrangeWizard

Techpill

Animals and Nature board
People think animals are part of nature

Emberfire

@Techpill
r and dom board
people think dom is r

Playboyize

@StrangeWizard
Ooh thatâ€™s nice

Evilember

@CouchChiller
i am a mathematics major
no you're not

How can we know that x(z + y) = xd + zy ?
Because we defined multiplication and addition that way
doesn't know the difference between a definition and a theorem
Sure you're a math major
LEARN ALGEBRA YOU WANKER

Harmless_Venom

@CouchChiller
how could we possibility know that without having a repeatable experiment that demonstrates the result?
i am a mathematics major
If you really were, you wouldn't be asking this question