Sociology, psychology, economics are not falsifiable because precisely the subjects are unique humans that cannot be measured so generically.
Many experiments done from sociology and psychology render the entire field false. Example, once they tried to replicate an experiment. Everything was exactly the same but the tapestry of the wall. The results were completely different.
This is to demonstrate how fluid the human character is and how hard is to contact experiment. No replication = no science as far as I am concerned.