Who Knows

Do we really exist?
Do we really know what we're even saying?
Do we believe that everything we see, hear, eat, smell, and touch?
If we really exist, why do we exist?
Who created us? If God created us, then who created God? Why can't we see God?
Why do we have social norms? Why do we have things outside the social norm?
Who was the first person in our family tree?
Are crimes really as bad as people make them out to be? Why are non-criminal things not considered to be crime?
Why are many things considered to be "taboo"?
Why do we even have a law? What if there was no law in this world? How do we determine what's against the law and what isn't?
Why don't we teach children exactly everything even though they aren't as developed as older people?
Who came up with the concept of "respect"? What's the purpose of it?
Why do people believe life has meaning and purpose?
Does discrimination against anyone really occur as much as society thinks it does? Does it really exist?
Why do humans and animals have their own species?
Who came up with the concepts of houses, schools, jobs, prison/jail (don't know the difference) and other places/institutions and why, when, and how?
If multiple countries exist in this world, then how were they found, discovered, and created, and why?
How do people exactly determine what's good/bad, right/wrong, true/false, correct/incorrect, etc.? How did they determine things in such ways in the first place?
If other planets exist, then where did they come from? Why does the world have a sun and a moon? Where did those come two from?
If everything exists in this world, then who even invented all of these stuff in the first place?