On the Anthropic Principle - the selection bias
Many physicists observe that Universe seems to be carefully crafted to sustain life. Only slight changes to physical laws constants would make life as we know it impossible. However, I think this is more like a case of selection bias. We observe these physical constants because we happen to live a type of life that is possible in this observable Universe. Thought experiment Let's imagine there are 4 Universes. I don't find too many arguments for the multiverse hypothesis, but let's imagine them for the sake of argument. First Universe is similar to our own Universe, it can sustain a type of life based on Carbon matter combined with various other atoms The second Universe has slightly different physical constants that makes Carbon links unstable. Still, life is still possible based on Silicon, including some humanoid intelligent beings The third Universe is way different, it consists mostly on anti-matter. However, intelligent life can develop based on Carbon anti-matter Th...