When quantum mechanics was formulated almost a century ago, it overturned two particularly cherished assumptions about the world’s workings. First was realism. Unlike classical physics, which says the world exists independently of observers and observations, quantum theory strongly implies that reality does not exist, or at least cannot be meaningfully described, until it is observed.
Today I spoke the trace using the word reservation I just learned,because I think it can indicate my meaning that those people and plane or ship were ever been reserved or existed or shot in the sky or ocean.Now I saw the observation corresponding to reservation in Sciencist.