The eighth season of the animated television series "The Fairly OddParents" first aired on Nickelodeon on February 12, 2011, with the episode "Love Triangle". This season began airing in the United States even though there were still several Season 7 episodes that had yet to be broadcast, including the aforementioned season premiere's preceding lead-in episode, "Spellementary School".
Nickelodeon did not exist in 1981.
Nothing in the text conclusively proves or disproves the statement, we only know that Nickelodeon existed in 2011 for sure. It's difficult because the system seems to always think statements like this are correct for reasons I'm not sure of.
( z1 exist :polarity - :ARG1 ( z2 company :name ( z3 name :op "Nickelodeon" ) ) :time ( z4 date-entity :year 1981 ) )