How can we be sure this is reality?

[Violet]

As they are, not how you want them to be. We are all entitled to our own opinions, not our own facts.

You're funny. Every fact ever established is the opinion of someone/a group of someones who is/are considered 'qualified' to make that opinion. Everything from 2+2 being 4 to the water density on the moon is just that: opinion, justified by various evidences taken on faith to be true.

Demonstrate it being otherwise, if you disagree. (By the way, you can't, but I wish you the best of luck!)

Uttering something does not prove anything except the ability to physically utter it. Otherwise Angelina Jolie is my wife, somehow I think you'd could bet a billion dollars against that claim and not worry about losing that bet.

Angelina Jolie is your wife... in an alternate cosmos, in your head, in a fanfic I once wrote, in my bed, controller tiger purple fur airplane. You'd lose that bet, as you phrased such an interpretable variable.

How about you qualify and quantify and clarify?

http://www.youtube.com/watch?v=6CpEIhdHlxM

My utterance of a thing proves its vocal existence. If I thought about it: its mental/neurological existence. If I heard it, if I saw the breath from it on a cold day, if it was heard by another or a billion or a moth, if it was a multidimensional/multiplanar utterance, if it was scientifically observed by a nonhuman source... and what constitutes 'proof' anyway? You need only look back upon 'fact'... now tell me: are you qualified to make the judgement of 'what is proven'?

You used the word "HOW" now why is that? Because HOW we determine facts is important. That does not mean we default to everything being true as a starting point first.

Otherwise we can make up whatever we want.

Everything is true, and nothing is also true. Something is always true.

You can make up anything you want: nothing is not not permitted, everything is not not permitted.

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Oh boy, ultimately there is no purpose, there is no cognition causing the why. There are scientific observations that explain reality, but there is no cognition making us like a boss running a factory.

Boy, don't you just know everything?

There are no scientific observations that explain reality, unless ducks explains volcanic eruption on Mars.

Can you prove that there is no grain of sand on an african beach that is responsible for everything you see in this universe? You could have that power if you can find it.

Just like science can explain how and why a hurricane forms but that hurricane doesn't need an ocean god named Posiden as a cause.

That hurricane doesn't need your silly science as a cause either: Poseidon doesn't need to be responsible for it either.

The universe happens, regardless of what you think of it...

Or maybe... it doesn't.

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But with what purpose do those things exist?
Why were they created?

The purpose of the existence of the material is as toys.

And they were created to be played with.