Physics & Philosophy shower thoughts

How do I know what I see is there? What if my brain somehow filters what is unnecessary so that I am only focused on the essential? So I'm just seeing simplified model? I suppose this could have been an evolutionary advantage for the first humans, and maybe even now, somehow. This theory would have its pros and cons, but as weird and intriguing as any theory can be, if it is wrong, it's wrong, and you can find many blogs refuting this idea with the following: 1) The irony of the unreal If what I'm able to see and perceive isn't reality, then what is 'reality'? The fact humans can make up the word 'reality' shows that we are aware of our capacity to perceive the world around us. Reality is exactly that- the truth that surrounds us. When philosophers use the words 'model' or 'reality', they have come to think about those concepts by using their intuitive sense that what surrounds us is real. In other words, we are not born with co...

This question might seem ridiculous at first, but it follows a process of thought. The other day I was talking to a professor and he believed that if the universe is infinite, not only will there be another 'him', there will be infinite copies of him. The reasoning: "the probability of another 'me' existing in the universe is not zero, even if it is seemingly very low. So as the number of trials tend infinity, the probability of at least a single copy of 'me' existing again increases and increases. Eventually, we reach a number of trials/'spaces' that the probability of at least one other of me existing is so high...there will have to be another copy of me certainly. Put another way, matter can arrange itself in different ways (quantum states). But the number of different arrangements is not infinite. So after a certain amount of space, the combinations will start to repeat over again. I (as a person) and my entire life (as a sequence of events) ...