Is everything random, or are at least some things logical? Math problems and logic are thought by our minds, then we attribute them to the world and we think that they are universal, as the world is shaped according to them. This way we forget that it is still us thinking all of these things.
When we see that, if we add two apples to two more apples, we have 4 apples as a final result, a lot of people think that this is an objective phenomenon of nature, not dependent on us, because it works the same to everybody, everytime, everywhere. This way we forget that the very ideas of “2”, “4”, “apple”, “adding”, “result”, every idea, scheme and frame involved in all of this, they are all built by our brain. The final result of “4” looks like a proof, an evidence that the operation happened outside our brain, but we again forget that the final perception, evaluation, idea, of “4” comes from our brain, our mind.
From a relativistic point of view we can realize that, in any operation, it is impossible to do it without our brain interfering in it, at least in the last stage, when we receive the final information. So, if it is impossible to understand anything without using our brain, how can we trust our understanding, since any check, any verification needs our brain again to be introduced in the process?
This means that we can accept a rough idea of objectivity in everyday life, but, if we want to be fundamentally exact, precise, like philosophy wants to be, we are forced not to trust any of our knowledge, because any knowledge cannot escape receiving interference of our mind.