The human brain generates certain electrical signals, called brain waves when it sees or hears something similar to something it once experienced or remembered from the past. The brain waves are called 'P300' or 'MERMER' because they occur 0.3 seconds, or 300 milliseconds, after the recognition of that information.
The method of measuring this 'P300' and establishing whether the brain already had information about something is called brain fingerprinting.
This could be used to determine whether a suspect or witness to a crime is aware of relevant information by showing them objects or images related to the case and measuring whether or not 'P300' occurs at that time.
This technology was being researched by an American scientist, Dr. Lawrence Farwell, and today, with the cooperation of the CIA and FBI, is said to be in the countdown to commercialization.
In fact, there are reports that the CIA and FBI are considering using brain fingerprinting as a reference in investigations to prevent false convictions, and it may not be long before it's used as evidence in court cases.
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