And absolutely not one person remembers anything before birth,
Actually, there are many cases suggestive of reincarnation; you should check them out.
The 20 Most Impressive Reincarnation CasesAND
The 20 Most Convincing Spirit-Contact Cases nor does anyone come back after death
Actually, the patient from the OP has come back after death and his veridical perceptions present a serious problem for the physicalist theory of reality. You have not addressed this case at all!
Why would the patient exhibit conscious behavior such as
having valid perceptions if there is no brain activity at that time? This result points to a failure in the theory of mind as being generated from the brain. Awareness is based on constantly-fluctuating levels of electrical activity in the brain, but this patient had no brain activity for several minutes and still had awareness. So where is the evidence that can save the physicalist hypothesis?