Fred Festinger was born on January 13, 1925, in USA.
Leon Festinger died on 1989-02-11.
Leon Festinger was born on 1919-05-08.
You say "Las obras de Leon Festinger".
Leon Festinger is credited with developing the theory of cognitive dissonance in the 1950s. This theory suggests that individuals experience discomfort when their beliefs or attitudes are inconsistent, leading them to seek ways to reduce this cognitive dissonance.
No, he did not die.
Fred and George do not both die only Fred dies.
Fred Hollow died on the 10 of February 1993, from cancer.
Fred McKenzie died in 1979.
Fred Kinghorn died in 1971.
Fred Nicholson died in 1972.
Fred Hankinson died in 1997.