Probably the same way as those of the Nordyke twins and that of Stig John Wadelich.
Because Monika is from Sweden, she told CNN that she had not seen many black children or babies before, which was why she particularly remembers seeing this black baby in the nursery. When President Obama became a candidate in 2008, Monika noticed his birth date and hospital in an article and remembered that day in the nursery. She believes that baby she spotted was indeed President Obama. ###
As of the 2010 U.S. Census, there were 1,360,301 people living in Hawaii. Of those people, 24.7% were Caucasian, 14.5% were of Filipino descent, 13.6% were of Japanese descent, 8.9% were of Hispanic or Latino descent, 5.9% were of Hawaiian descent and 4.0% were of Chinese descent. Interestingly, 23.6% of the population identified themselves as belonging to two or more races, up 2% from the 2000 census. Of those people who identify themselves as belonging totally of one race alone or in combination with one or more other races, 57.4% are in whole or partially Asian, 41.5% in whole or partially Caucasian and 26.2% in whole or partially Native Hawaiian and Other Pacific Islander.
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Needless to say, if she saw a coloured child on that day, it might have been any combination of the above...a polynesian/pacific islander offspring for example. I know the stats quoted above are recent, but a similar situation would have existed in 1961.
Her recollection is imo worthless.