Philosophy of Everything

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...

In the double slit experiment , the puzzle is to explain why measurement of which way the particle went destroys the interference pattern. Interference pattern Let's first challenge the usual assumption that the interference pattern is the results of wave phase interference between particles, even when they are passing one by one. The classical interpretation is that the wave of the particle interferes with itself, that is a little far fetched for me. The interference appears for photons, electrons and even bigger molecules. As the slits are rather tight (fractions of millimeters), we can imagine that the particle has a certain phase that interferes with a certain phase of the walls of the slits. Depending on the timing of the interaction, the particle's wave is deviated by an angle that depends on the periodicity of the two waves - the particle and the walls of the slit.  When there is a single slit, the particle tends to synchronize the walls of the slit with its own phase, s...

We know that water boils at 100 degrees Celsius, right? Or not ; on mount Everest the water boils at around 70 degrees Celsius, so you can't even boil an egg . Ok, we have a more complex model that links the boiling temperature with pressure, but even that model is not exact at any given pressure. On some temperatures, our linear models fail, for example water cooled below 4 degrees Celsius will not continue to get denser, but it will actually expand, allowing the cold water to float on the surface until it becomes ice. In general, lower temperature would predict lower density in substances. There is nothing in the common physical laws that would predict such anomaly  in water, while we can later construct even more complicated models to explain what is happening with water.

A virtual machine is a common example of simulation. It can take the description of a (virtual) "computer" state and continue the execution from that point on. You can simulate a huge computer given a computer with more memory than the virtual machine, although it might be way slower. However, such virtual machine does not answer the problem because it normally simulates a computer with less memory. The question is, can a computer to simulate a virtual computer that has the same capabilities as itself? Before answering this, let's exclude some trivial (forbidden) cases of "simulations": A calculator will always do exactly what it does, it will be identical with itself, we will not call this a simulation of itself. Copying the exact state of another identical computer in a "twin brother" will not be considered simulation. Starting 2 identical computers with the same input will not be considered like one is simulating the other.

"Believe" is often associated with religion. However, even for using the " scientific method ", we are forced to assume certain qualities of the Universe that we cannot prove nor fully verify. The most basic assumption is that there are common laws that are universal and they function the same across the whole Universe. This is a leap of faith that we have to take if we believe that the Universe can be understood at all by humans.