Sentence:  We speculate that compulsives in the unstructured schools are under greater strain because of the lack of systemization in their school setting , but that their need to organize ( for comfort ) is so intense that they struggle to induce the phonic <WSD>rules</WSD> and achieve in spite of the lack of direction from the environment . 
Meaning of the word marked with <WSD> tags:  a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct