Wikipedia can't be used as a source nikka
Its not "wikipedia" asswipe.
Its simple cognitive bias and introductory psychology. Read the sources on the bottom of the page.
The Forer Effect has been studied for decades.
All you have to do is take everyone's fortune telling for the day, take the labels off and replace them on someone elses tab, then hand it to them, then they'll think what they read applies to them.