Half of a yellow sun chimamanda describes plagiarism allegation as laughable

I think there may be some confusion here.

Half of a Yellow Sun is a novel by Chimamanda Ngozi Adichie, published in 2006. While Chimamanda Ngozi Adichie is a renowned author and public figure, I couldn't find any information or quotes from her describing plagiarism allegations as "laughable".

It's possible that you may be thinking of a different author or public figure who made a statement about plagiarism allegations being "laughable". If you could provide more context or clarify what you're referring to, I'd be happy to try and help you further!