Scan the past? We are dissatisfied not only with the personal, but also on a large scale: oh, if not for this, oh, if not? "Oh, if" - you were not similar, maybe more similar (and the "micro-variable" with a fraction of a second is bigger, less similar), but also one. . Personality is not statically given, but a dynamic result of a unique set of circumstances. It all starts at the reproductive mathematics level: at conception, hundreds of millions of sperm compete, each carrying a unique combination of genes after passage. A change in a parent's breath or the slightest delay for a split second completely changes the winner. At the same time, the biological probability of a particular person is erased, and instead his genetic brother or sister is born with a completely different temperament. The physical body is also built by chance. Unique fingerprints and patterns of the retina of the eye are not encoded directly in DNA - they are formed during embryonic development under the influence of chaotic microtorques and artistic water pressures. Every movement of the mother or momentary change in her biochemistry creates a different pattern of skin and wings. That chaos shapes the physical architecture of memory and its connection. A map of billions of neural connections. Memories and world view are not stored in the brain like files on a disk. These are material components of neurons that are held together by the synaptic plasticity. The brain is constantly performing synaptic coding - cutting some connections and strengthening others based on momentary experience. Every micro-variable in the past causes a re-destruction of this architecture. The brain becomes physically different. At the same time, epigenetic works: external events place chemical marks on DNA, turning into certain genes. The slightest change in environmental conditions in the past changes these signs, making the hormonal background and the sensitivity of receptors for dopamine, serotonin or cortisol.