Complex sentence: Larry Niven's own writings have neither confirmed nor denied if this information is canon, however, he has stated personally that it is not canon, as per the Wikipedia entry on the Man-Kzin Wars series.
Split into simpler sentences: Larry Niven's own writings have neither confirmed nor denied if this information is canon. However, he has stated personally that it is not canon, as per the Wikipedia entry on the Man-Kzin Wars series.