troublesome, tricky, complicated; see complex 2, difficult 2.
"knotty." YourDictionary, n.d. Web. 11 October 2018. <http://thesaurus.yourdictionary.com/knotty>.
knotty. (n.d.). Retrieved October 11th, 2018, from http://thesaurus.yourdictionary.com/knotty
Difficult to understand because of intricacy:
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