the true purpose is to learn all about our world, in every aspect possible, so we can reach the depths of knowledge, or find out if knowledge is finite or infinite and eventually find definite proof what the purpose is, or find proof there is no purpose. and along the way, we can enhance our lives to live better in general.
if knowledge is infinite, this needs to be reevaluated when we know for sure knowledge is infinite.
"the true purpose is to learn all about our world"
Is it? I thought that was closer to a desire, a want, occasionally a need for many (not all), not any sense of purpose or reason for existing. A person could live without learning beyond a basic level of functioning and still succeed in the act of existing, and many resist learning and don't always fail from doing so (in their minds, they believe they've "learned enough"). Also, if it were our purpose to learn all about our world in every aspect possible, ignorance wouldn't be a more common approach, our desire to learn everything would remain present even when it contradicts one's world views. No, this is simply a reason to keep going, a reason to keep seeking itself, a result of further human hype, not full blown "purpose".
Purpose in this sense is defined as: "The reason for which something is done or created or for which something exists", such as a shovel's purpose being digging. A person who believes in God strongly for example believes their purpose is connected to faith. A business tycoon may believe their purpose is to succeed in making money, forming status, that sort of thing. A librarian may believe their purpose is the pursuit of knowledge from a specified field if not generally. They may seek to find as much as they can within that limited frame of purpose seeking, but it still does not truly explain why people were created or why they exist, it simply notes the answer they accepted within the range of human thought.
To assume our purpose has anything to do with the human limitations of thinking is to limit our options significantly, so I find it easier to, until more answers are found, sit on an Occam's Razor style of reasoning of a true purpose not existing. A lack of "why" so far makes more sense than any overly specific answer that applies to everyone at once.
If any purpose for people as a whole were to be found, my first thought would be to find that which is present in every living person, that if no longer present would kill the person. In that sense, my closest answer is "consumption", but then the question just asks "why" for that. "No reason" is the best I've got, if not questioning the importance of purpose in the first place.
Edit: Huh, on second thought, maybe the purpose of people itself is purpose seeking, the reason seeking itself being the reason for it. What other manner of creature care to such a degree about it other than people? Why would things like Existential Crisis even exist otherwise? It still falls into "no reason" digging with enough time, so I'm not sure it's enough of an answer really.
Still in the grand scheme of things shows people to largely be unimportant I'd argue if that's all there is to it, if the endgame is pointless beyond personal appraisal at best. We'd have more luck finding answers with an "outside opinion", if we were to meet a manner of creature that was sentient, yet possessed an understanding of life completely alien to our own, to compare notes with. It'd at least help us see how much of it is "human" versus "sentient".
"I just got the most amazing idea. What if we created a topic specifically dedicated to the purpose of me."
In the grand scheme of things, you are completely and utterly worthless, a spec of dust drifting through existence, a fungus thriving on a glorified piece of space rock. You will never amount to anything except the things people feel are important at best, and your "purpose" will carry no weight when tossed into the lake of existence. The ripples will be barely noticeable, the stone that is your purpose won't skip across the water, you will amount to nothing important, and eventually... die.
I have nothing against you, but you were wanting to know about your "purpose". Any purpose you carry is largely irrelevant, lacks any real meaning, and is largely unimportant, the byproduct of human nature's hype, so you might as well just do whatever you want freely without the burden of seeking "true" purpose.
"My point here is, that all these reasons, or goals, to live are fake."
It got interesting from that line on really, but the problem I have with your shpeal there from two years ago is that most forms of Knowledge could be seen as just as "fake" as everything else. It's seen through human eyes, judged through human thought, and appraised to mean what people will see it as. The purity of the knowledge itself becomes even more detached from the individual when learned through a book, as already a person had to appraise it and write how they understood it, as opposed to being that much closer to the raw understanding that may exist. Once you learn from another person's findings you've made the knowledge that much more human, and human understanding is inherently flawed from being the only sentient perspective that we really have.
We'd truly need a life form that isn't human, yet is sentient enough to converse, to see that which is largely human and be fully capable of separating that from our findings. Until that time, even our knowledge carries the flaws of perspective, spin, and human understanding. Crafting it wouldn't work either (such as making a machine of such a nature to converse with) because it'd still carry the taint of human influence, of human craftsmanship, of human understanding.
I think it'd be interesting to find a species of sentient life that is completely unconcerned with purpose, with reasons, with goals. I think it'd humble our attachment to it and make it be seen as a largely human thing, a finding that could help with transcending those limitations (it'd more than likely just have people see themselves as superior or smarter, but that's another problem altogether).
As for "What is the meaning of life" being the "last question", I have my doubts. What about questions that'd follow that answer, if not the question "What is the purpose of meaning"?